diff --git a/Source/Modules/ControllerModules/KeyHandler_Core.swift b/Source/Modules/ControllerModules/KeyHandler_Core.swift
index 4ba339b2..519c8b30 100644
--- a/Source/Modules/ControllerModules/KeyHandler_Core.swift
+++ b/Source/Modules/ControllerModules/KeyHandler_Core.swift
@@ -43,11 +43,11 @@ protocol KeyHandlerDelegate {
 class KeyHandler {
   let kEpsilon: Double = 0.000001
   let kMaxComposingBufferNeedsToWalkSize: Int = 10
-  var _composer: Tekkon.Composer = .init()
-  var _languageModel: vChewing.LMInstantiator = .init()
-  var _userOverrideModel: vChewing.LMUserOverride = .init()
-  var _builder: Megrez.BlockReadingBuilder
-  var _walkedNodes: [Megrez.NodeAnchor] = []
+  var composer: Tekkon.Composer = .init()
+  var compositor: Megrez.Compositor
+  var currentLM: vChewing.LMInstantiator = .init()
+  var currentUOM: vChewing.LMUserOverride = .init()
+  var walkedAnchors: [Megrez.NodeAnchor] = []
 
   var delegate: KeyHandlerDelegate?
 
@@ -59,29 +59,29 @@ class KeyHandler {
 
       let isCHS: Bool = (newValue == InputMode.imeModeCHS)
       // Reinitiate language models if necessary
-      _languageModel = isCHS ? mgrLangModel.lmCHS : mgrLangModel.lmCHT
-      _userOverrideModel = isCHS ? mgrLangModel.uomCHS : mgrLangModel.uomCHT
+      currentLM = isCHS ? mgrLangModel.lmCHS : mgrLangModel.lmCHT
+      currentUOM = isCHS ? mgrLangModel.uomCHS : mgrLangModel.uomCHT
 
       // Synchronize the sub-languageModel state settings to the new LM.
       syncBaseLMPrefs()
 
       // Create new grid builder and clear the composer.
       createNewBuilder()
-      _composer.clear()
+      composer.clear()
     }
   }
 
   public init() {
-    _builder = Megrez.BlockReadingBuilder(lm: _languageModel, separator: "-")
+    compositor = Megrez.Compositor(lm: currentLM, separator: "-")
     ensureParser()
     // 下面這句必須用 defer，否則不會觸發其 willSet 部分的內容。
     defer { inputMode = IME.currentInputMode }
   }
 
   func clear() {
-    _composer.clear()
-    _builder.clear()
-    _walkedNodes.removeAll()
+    composer.clear()
+    compositor.clear()
+    walkedAnchors.removeAll()
   }
 
   // MARK: - Functions dealing with Megrez.
@@ -91,11 +91,11 @@ class KeyHandler {
     // of the best possible Mandarin characters given the input syllables,
     // using the Viterbi algorithm implemented in the Megrez library.
     // The walk() traces the grid to the end.
-    _walkedNodes = _builder.walk()
+    walkedAnchors = compositor.walk()
 
     // if DEBUG mode is enabled, a GraphViz file is written to kGraphVizOutputfile.
     if mgrPrefs.isDebugModeEnabled {
-      let result = _builder.grid.dumpDOT
+      let result = compositor.grid.dumpDOT
       do {
         try result.write(
           toFile: "/private/var/tmp/vChewing-visualization.dot",
@@ -117,13 +117,13 @@ class KeyHandler {
     // (i.e. popped out.)
 
     var poppedText = ""
-    if _builder.grid.width > mgrPrefs.composingBufferSize {
-      if !_walkedNodes.isEmpty {
-        let anchor: Megrez.NodeAnchor = _walkedNodes[0]
+    if compositor.grid.width > mgrPrefs.composingBufferSize {
+      if !walkedAnchors.isEmpty {
+        let anchor: Megrez.NodeAnchor = walkedAnchors[0]
         if let theNode = anchor.node {
           poppedText = theNode.currentKeyValue.value
         }
-        _builder.removeHeadReadings(count: anchor.spanningLength)
+        compositor.removeHeadReadings(count: anchor.spanningLength)
       }
     }
     walk()
@@ -132,17 +132,17 @@ class KeyHandler {
 
   func buildAssociatePhraseArray(withKey key: String) -> [String] {
     var arrResult: [String] = []
-    if _languageModel.hasAssociatedPhrasesForKey(key) {
-      arrResult.append(contentsOf: _languageModel.associatedPhrasesForKey(key))
+    if currentLM.hasAssociatedPhrasesForKey(key) {
+      arrResult.append(contentsOf: currentLM.associatedPhrasesForKey(key))
     }
     return arrResult
   }
 
   func fixNode(value: String, respectCursorPushing: Bool = true) {
     let cursorIndex = min(actualCandidateCursorIndex + (mgrPrefs.useRearCursorMode ? 1 : 0), builderLength)
-    _builder.grid.fixNodeSelectedCandidate(location: cursorIndex, value: value)
+    compositor.grid.fixNodeSelectedCandidate(location: cursorIndex, value: value)
     //  // 因半衰模組失能，故禁用之。
-    // let selectedNode: Megrez.NodeAnchor = _builder.grid.fixNodeSelectedCandidate(
+    // let selectedNode: Megrez.NodeAnchor = compositor.grid.fixNodeSelectedCandidate(
     //  location: cursorIndex, value: value
     // )
     //  // 不要針對逐字選字模式啟用臨時半衰記憶模型。
@@ -166,8 +166,8 @@ class KeyHandler {
     //  }
     //  if addToUserOverrideModel {
     //    IME.prtDebugIntel("UOM: Start Observation.")
-    //    _userOverrideModel.observe(
-    //      walkedNodes: _walkedNodes, cursorIndex: cursorIndex, candidate: value,
+    //    currentUOM.observe(
+    //      walkedNodes: walkedAnchors, cursorIndex: cursorIndex, candidate: value,
     //      timestamp: NSDate().timeIntervalSince1970
     //    )
     //  }
@@ -176,7 +176,7 @@ class KeyHandler {
 
     if mgrPrefs.moveCursorAfterSelectingCandidate, respectCursorPushing {
       var nextPosition = 0
-      for node in _walkedNodes {
+      for node in walkedAnchors {
         if nextPosition >= cursorIndex { break }
         nextPosition += node.spanningLength
       }
@@ -215,15 +215,15 @@ class KeyHandler {
     let overrideValue =
       mgrPrefs.useSCPCTypingMode
       ? ""
-      : _userOverrideModel.suggest(
-        walkedNodes: _walkedNodes, cursorIndex: builderCursorIndex,
+      : currentUOM.suggest(
+        walkedNodes: walkedAnchors, cursorIndex: builderCursorIndex,
         timestamp: NSDate().timeIntervalSince1970
       )
 
     if !overrideValue.isEmpty {
       IME.prtDebugIntel(
         "UOM: Suggestion retrieved, overriding the node score of the selected candidate.")
-      _builder.grid.overrideNodeScoreForSelectedCandidate(
+      compositor.grid.overrideNodeScoreForSelectedCandidate(
         location: min(actualCandidateCursorIndex + (mgrPrefs.useRearCursorMode ? 1 : 0), builderLength),
         value: overrideValue,
         overridingScore: findHighestScore(nodes: rawNodes, epsilon: kEpsilon)
@@ -251,89 +251,89 @@ class KeyHandler {
   func ensureParser() {
     switch mgrPrefs.mandarinParser {
       case MandarinParser.ofStandard.rawValue:
-        _composer.ensureParser(arrange: .ofDachen)
+        composer.ensureParser(arrange: .ofDachen)
       case MandarinParser.ofDachen26.rawValue:
-        _composer.ensureParser(arrange: .ofDachen26)
+        composer.ensureParser(arrange: .ofDachen26)
       case MandarinParser.ofETen.rawValue:
-        _composer.ensureParser(arrange: .ofETen)
+        composer.ensureParser(arrange: .ofETen)
       case MandarinParser.ofHsu.rawValue:
-        _composer.ensureParser(arrange: .ofHsu)
+        composer.ensureParser(arrange: .ofHsu)
       case MandarinParser.ofETen26.rawValue:
-        _composer.ensureParser(arrange: .ofETen26)
+        composer.ensureParser(arrange: .ofETen26)
       case MandarinParser.ofIBM.rawValue:
-        _composer.ensureParser(arrange: .ofIBM)
+        composer.ensureParser(arrange: .ofIBM)
       case MandarinParser.ofMiTAC.rawValue:
-        _composer.ensureParser(arrange: .ofMiTAC)
+        composer.ensureParser(arrange: .ofMiTAC)
       case MandarinParser.ofFakeSeigyou.rawValue:
-        _composer.ensureParser(arrange: .ofFakeSeigyou)
+        composer.ensureParser(arrange: .ofFakeSeigyou)
       case MandarinParser.ofHanyuPinyin.rawValue:
-        _composer.ensureParser(arrange: .ofHanyuPinyin)
+        composer.ensureParser(arrange: .ofHanyuPinyin)
       case MandarinParser.ofSecondaryPinyin.rawValue:
-        _composer.ensureParser(arrange: .ofSecondaryPinyin)
+        composer.ensureParser(arrange: .ofSecondaryPinyin)
       case MandarinParser.ofYalePinyin.rawValue:
-        _composer.ensureParser(arrange: .ofYalePinyin)
+        composer.ensureParser(arrange: .ofYalePinyin)
       case MandarinParser.ofHualuoPinyin.rawValue:
-        _composer.ensureParser(arrange: .ofHualuoPinyin)
+        composer.ensureParser(arrange: .ofHualuoPinyin)
       case MandarinParser.ofUniversalPinyin.rawValue:
-        _composer.ensureParser(arrange: .ofUniversalPinyin)
+        composer.ensureParser(arrange: .ofUniversalPinyin)
       default:
-        _composer.ensureParser(arrange: .ofDachen)
+        composer.ensureParser(arrange: .ofDachen)
         mgrPrefs.mandarinParser = MandarinParser.ofStandard.rawValue
     }
-    _composer.clear()
+    composer.clear()
   }
 
   // MARK: - Extracted methods and functions (Megrez).
 
-  var isBuilderEmpty: Bool { _builder.grid.width == 0 }
+  var isBuilderEmpty: Bool { compositor.grid.width == 0 }
 
   var rawNodes: [Megrez.NodeAnchor] {
     /// 警告：不要對游標前置風格使用 nodesCrossing，否則會導致游標行為與 macOS 內建注音輸入法不一致。
     /// 微軟新注音輸入法的游標後置風格也是不允許 nodeCrossing 的。
     mgrPrefs.useRearCursorMode
-      ? _builder.grid.nodesBeginningAt(location: actualCandidateCursorIndex)
-      : _builder.grid.nodesEndingAt(location: actualCandidateCursorIndex)
+      ? compositor.grid.nodesBeginningAt(location: actualCandidateCursorIndex)
+      : compositor.grid.nodesEndingAt(location: actualCandidateCursorIndex)
   }
 
   func syncBaseLMPrefs() {
-    _languageModel.isPhraseReplacementEnabled = mgrPrefs.phraseReplacementEnabled
-    _languageModel.isCNSEnabled = mgrPrefs.cns11643Enabled
-    _languageModel.isSymbolEnabled = mgrPrefs.symbolInputEnabled
+    currentLM.isPhraseReplacementEnabled = mgrPrefs.phraseReplacementEnabled
+    currentLM.isCNSEnabled = mgrPrefs.cns11643Enabled
+    currentLM.isSymbolEnabled = mgrPrefs.symbolInputEnabled
   }
 
   func createNewBuilder() {
     // Each Mandarin syllable is separated by a hyphen.
-    _builder = Megrez.BlockReadingBuilder(lm: _languageModel, separator: "-")
+    compositor = Megrez.Compositor(lm: currentLM, separator: "-")
   }
 
-  var currentReadings: [String] { _builder.readings }
+  var currentReadings: [String] { compositor.readings }
 
   func ifLangModelHasUnigrams(forKey reading: String) -> Bool {
-    _languageModel.hasUnigramsFor(key: reading)
+    currentLM.hasUnigramsFor(key: reading)
   }
 
   func insertReadingToBuilderAtCursor(reading: String) {
-    _builder.insertReadingAtCursor(reading: reading)
+    compositor.insertReadingAtCursor(reading: reading)
   }
 
   var builderCursorIndex: Int {
-    get { _builder.cursorIndex }
-    set { _builder.cursorIndex = newValue }
+    get { compositor.cursorIndex }
+    set { compositor.cursorIndex = newValue }
   }
 
   var builderLength: Int {
-    _builder.length
+    compositor.length
   }
 
   func deleteBuilderReadingInFrontOfCursor() {
-    _builder.deleteReadingAtTheRearOfCursor()
+    compositor.deleteReadingAtTheRearOfCursor()
   }
 
   func deleteBuilderReadingToTheFrontOfCursor() {
-    _builder.deleteReadingToTheFrontOfCursor()
+    compositor.deleteReadingToTheFrontOfCursor()
   }
 
   var keyLengthAtIndexZero: Int {
-    _walkedNodes[0].node?.currentKeyValue.value.count ?? 0
+    walkedAnchors[0].node?.currentKeyValue.value.count ?? 0
   }
 }
diff --git a/Source/Modules/ControllerModules/KeyHandler_HandleCandidate.swift b/Source/Modules/ControllerModules/KeyHandler_HandleCandidate.swift
index a57d3bc3..19447499 100644
--- a/Source/Modules/ControllerModules/KeyHandler_HandleCandidate.swift
+++ b/Source/Modules/ControllerModules/KeyHandler_HandleCandidate.swift
@@ -350,7 +350,7 @@ extension KeyHandler {
       let punctuation: String = arrPunctuations.joined(separator: "")
 
       var shouldAutoSelectCandidate: Bool =
-        _composer.inputValidityCheck(key: charCode) || ifLangModelHasUnigrams(forKey: customPunctuation)
+        composer.inputValidityCheck(key: charCode) || ifLangModelHasUnigrams(forKey: customPunctuation)
         || ifLangModelHasUnigrams(forKey: punctuation)
 
       if !shouldAutoSelectCandidate, input.isUpperCaseASCIILetterKey {
diff --git a/Source/Modules/ControllerModules/KeyHandler_HandleInput.swift b/Source/Modules/ControllerModules/KeyHandler_HandleInput.swift
index a0895d56..18d797e8 100644
--- a/Source/Modules/ControllerModules/KeyHandler_HandleInput.swift
+++ b/Source/Modules/ControllerModules/KeyHandler_HandleInput.swift
@@ -146,37 +146,37 @@ extension KeyHandler {
     let skipPhoneticHandling = input.isReservedKey || input.isControlHold || input.isOptionHold
 
     // See if Phonetic reading is valid.
-    if !skipPhoneticHandling && _composer.inputValidityCheck(key: charCode) {
-      _composer.receiveKey(fromCharCode: charCode)
+    if !skipPhoneticHandling && composer.inputValidityCheck(key: charCode) {
+      composer.receiveKey(fromCharCode: charCode)
       keyConsumedByReading = true
 
       // If we have a tone marker, we have to insert the reading to the
       // builder in other words, if we don't have a tone marker, we just
       // update the composing buffer.
-      let composeReading = _composer.hasToneMarker()
+      let composeReading = composer.hasToneMarker()
       if !composeReading {
         stateCallback(buildInputtingState)
         return true
       }
     }
 
-    var composeReading = _composer.hasToneMarker()  // 這裡不需要做排他性判斷。
+    var composeReading = composer.hasToneMarker()  // 這裡不需要做排他性判斷。
 
     // See if we have composition if Enter/Space is hit and buffer is not empty.
     // We use "|=" conditioning so that the tone marker key is also taken into account.
     // However, Swift does not support "|=".
-    composeReading = composeReading || (!_composer.isEmpty && (input.isSpace || input.isEnter))
+    composeReading = composeReading || (!composer.isEmpty && (input.isSpace || input.isEnter))
     if composeReading {
-      if input.isSpace, !_composer.hasToneMarker() {
-        _composer.receiveKey(fromString: " ")  // 補上空格。
+      if input.isSpace, !composer.hasToneMarker() {
+        composer.receiveKey(fromString: " ")  // 補上空格。
       }
-      let reading = _composer.getComposition()
+      let reading = composer.getComposition()
 
       // See whether we have a unigram for this...
       if !ifLangModelHasUnigrams(forKey: reading) {
         IME.prtDebugIntel("B49C0979：語彙庫內無「\(reading)」的匹配記錄。")
         errorCallback()
-        _composer.clear()
+        composer.clear()
         stateCallback((builderLength == 0) ? InputState.EmptyIgnoringPreviousState() : buildInputtingState)
         return true
       }
@@ -191,7 +191,7 @@ extension KeyHandler {
       // dealWithOverrideModelSuggestions()  // 暫時禁用，因為無法使其生效。
 
       // ... then update the text.
-      _composer.clear()
+      composer.clear()
 
       let inputting = buildInputtingState
       inputting.poppedText = poppedText
@@ -240,7 +240,7 @@ extension KeyHandler {
 
     // MARK: Calling candidate window using Up / Down or PageUp / PageDn.
 
-    if let currentState = state as? InputState.NotEmpty, _composer.isEmpty,
+    if let currentState = state as? InputState.NotEmpty, composer.isEmpty,
       input.isExtraChooseCandidateKey || input.isExtraChooseCandidateKeyReverse || input.isSpace
         || input.isPageDown || input.isPageUp || (input.isTab && mgrPrefs.specifyShiftTabKeyBehavior)
         || (input.isTypingVertical && (input.isverticalTypingOnlyChooseCandidateKey))
@@ -362,7 +362,7 @@ extension KeyHandler {
     if input.isSymbolMenuPhysicalKey && !input.isShiftHold {
       if input.isOptionHold {
         if ifLangModelHasUnigrams(forKey: "_punctuation_list") {
-          if _composer.isEmpty {
+          if composer.isEmpty {
             insertReadingToBuilderAtCursor(reading: "_punctuation_list")
             let poppedText: String! = popOverflowComposingTextAndWalk
             let inputting = buildInputtingState
@@ -453,7 +453,7 @@ extension KeyHandler {
     // "thinking" that the key is not actually consumed.
     // 砍掉這一段會導致「F1-F12 按鍵干擾組字區」的問題。
     // 暫時只能先恢復這段，且補上偵錯彙報機制，方便今後排查故障。
-    if (state is InputState.NotEmpty) || !_composer.isEmpty {
+    if (state is InputState.NotEmpty) || !composer.isEmpty {
       IME.prtDebugIntel(
         "Blocked data: charCode: \(charCode), keyCode: \(input.keyCode)")
       IME.prtDebugIntel("A9BFF20E")
diff --git a/Source/Modules/ControllerModules/KeyHandler_States.swift b/Source/Modules/ControllerModules/KeyHandler_States.swift
index 6c516dbc..e0b76cca 100644
--- a/Source/Modules/ControllerModules/KeyHandler_States.swift
+++ b/Source/Modules/ControllerModules/KeyHandler_States.swift
@@ -41,7 +41,7 @@ extension KeyHandler {
     // We must do some Unicode codepoint counting to find the actual cursor location for the client
     // i.e. we need to take UTF-16 into consideration, for which a surrogate pair takes 2 UniChars
     // locations. Since we are using Swift, we use .utf16 as the equivalent of NSString.length().
-    for walkedNode in _walkedNodes {
+    for walkedNode in walkedAnchors {
       if let theNode = walkedNode.node {
         let strNodeValue = theNode.currentKeyValue.value
         composingBuffer += strNodeValue
@@ -78,14 +78,14 @@ extension KeyHandler {
               // Example in McBopomofo: Typing 王建民 (3 readings) gets a tree emoji.
               // Example in vChewing: Typing 義麵 (2 readings) gets a pasta emoji.
               switch builderCursorIndex {
-                case _builder.readings.count...:
-                  tooltipParameterRef[0] = _builder.readings[_builder.readings.count - 1]
+                case compositor.readings.count...:
+                  tooltipParameterRef[0] = compositor.readings[compositor.readings.count - 1]
                 case 0:
-                  tooltipParameterRef[1] = _builder.readings[builderCursorIndex]
+                  tooltipParameterRef[1] = compositor.readings[builderCursorIndex]
                 default:
                   do {
-                    tooltipParameterRef[0] = _builder.readings[builderCursorIndex - 1]
-                    tooltipParameterRef[1] = _builder.readings[builderCursorIndex]
+                    tooltipParameterRef[0] = compositor.readings[builderCursorIndex - 1]
+                    tooltipParameterRef[1] = compositor.readings[builderCursorIndex]
                   }
               }
             }
@@ -109,7 +109,7 @@ extension KeyHandler {
     }
 
     let head = String(utf16CodeUnits: arrHead, count: arrHead.count)
-    let reading = _composer.getInlineCompositionForIMK(isHanyuPinyin: mgrPrefs.showHanyuPinyinInCompositionBuffer)
+    let reading = composer.getInlineCompositionForIMK(isHanyuPinyin: mgrPrefs.showHanyuPinyinInCompositionBuffer)
     let tail = String(utf16CodeUnits: arrTail, count: arrTail.count)
     let composedText = head + reading + tail
     let cursorIndex = composedStringCursorIndex + reading.utf16.count
@@ -259,14 +259,14 @@ extension KeyHandler {
       return false
     }
 
-    if _composer.isEmpty {
+    if composer.isEmpty {
       insertReadingToBuilderAtCursor(reading: customPunctuation)
       let poppedText = popOverflowComposingTextAndWalk
       let inputting = buildInputtingState
       inputting.poppedText = poppedText
       stateCallback(inputting)
 
-      if mgrPrefs.useSCPCTypingMode, _composer.isEmpty {
+      if mgrPrefs.useSCPCTypingMode, composer.isEmpty {
         let candidateState = buildCandidate(
           state: inputting,
           isTypingVertical: isTypingVertical
@@ -345,7 +345,7 @@ extension KeyHandler {
 
     var composed = ""
 
-    for theAnchor in _walkedNodes {
+    for theAnchor in walkedAnchors {
       if let node = theAnchor.node {
         var key = node.currentKeyValue.key
         if mgrPrefs.inlineDumpPinyinInLieuOfZhuyin {
@@ -382,9 +382,9 @@ extension KeyHandler {
   ) -> Bool {
     guard state is InputState.Inputting else { return false }
 
-    if _composer.hasToneMarker(withNothingElse: true) {
-      _composer.clear()
-    } else if _composer.isEmpty {
+    if composer.hasToneMarker(withNothingElse: true) {
+      composer.clear()
+    } else if composer.isEmpty {
       if builderCursorIndex >= 0 {
         deleteBuilderReadingInFrontOfCursor()
         walk()
@@ -395,10 +395,10 @@ extension KeyHandler {
         return true
       }
     } else {
-      _composer.doBackSpace()
+      composer.doBackSpace()
     }
 
-    if _composer.isEmpty, builderLength == 0 {
+    if composer.isEmpty, builderLength == 0 {
       stateCallback(InputState.EmptyIgnoringPreviousState())
     } else {
       stateCallback(buildInputtingState)
@@ -415,7 +415,7 @@ extension KeyHandler {
   ) -> Bool {
     guard state is InputState.Inputting else { return false }
 
-    if _composer.isEmpty {
+    if composer.isEmpty {
       if builderCursorIndex != builderLength {
         deleteBuilderReadingToTheFrontOfCursor()
         walk()
@@ -448,7 +448,7 @@ extension KeyHandler {
     errorCallback: @escaping () -> Void
   ) -> Bool {
     guard state is InputState.Inputting else { return false }
-    if !_composer.isEmpty {
+    if !composer.isEmpty {
       IME.prtDebugIntel("9B6F908D")
       errorCallback()
     }
@@ -465,7 +465,7 @@ extension KeyHandler {
   ) -> Bool {
     guard state is InputState.Inputting else { return false }
 
-    if !_composer.isEmpty {
+    if !composer.isEmpty {
       IME.prtDebugIntel("ABC44080")
       errorCallback()
       stateCallback(state)
@@ -493,7 +493,7 @@ extension KeyHandler {
   ) -> Bool {
     guard state is InputState.Inputting else { return false }
 
-    if !_composer.isEmpty {
+    if !composer.isEmpty {
       IME.prtDebugIntel("9B69908D")
       errorCallback()
       stateCallback(state)
@@ -532,8 +532,8 @@ extension KeyHandler {
       stateCallback(InputState.EmptyIgnoringPreviousState())
     } else {
       // If reading is not empty, we cancel the reading.
-      if !_composer.isEmpty {
-        _composer.clear()
+      if !composer.isEmpty {
+        composer.clear()
         if builderLength == 0 {
           stateCallback(InputState.EmptyIgnoringPreviousState())
         } else {
@@ -554,7 +554,7 @@ extension KeyHandler {
   ) -> Bool {
     guard let currentState = state as? InputState.Inputting else { return false }
 
-    if !_composer.isEmpty {
+    if !composer.isEmpty {
       IME.prtDebugIntel("B3BA5257")
       errorCallback()
       stateCallback(state)
@@ -603,7 +603,7 @@ extension KeyHandler {
   ) -> Bool {
     guard let currentState = state as? InputState.Inputting else { return false }
 
-    if !_composer.isEmpty {
+    if !composer.isEmpty {
       IME.prtDebugIntel("6ED95318")
       errorCallback()
       stateCallback(state)
@@ -660,7 +660,7 @@ extension KeyHandler {
       return false
     }
 
-    guard _composer.isEmpty else {
+    guard composer.isEmpty else {
       IME.prtDebugIntel("A2DAF7BC")
       errorCallback()
       return true
@@ -679,7 +679,7 @@ extension KeyHandler {
     let cursorIndex = min(
       actualCandidateCursorIndex + (mgrPrefs.useRearCursorMode ? 1 : 0), builderLength
     )
-    for anchor in _walkedNodes {
+    for anchor in walkedAnchors {
       length += anchor.spanningLength
       if length >= cursorIndex {
         currentAnchor = anchor