SymbolNode // Allow defining "previous" on init.
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@ -15,9 +15,10 @@ class SymbolNode {
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var children: [SymbolNode]?
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var children: [SymbolNode]?
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var previous: SymbolNode?
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var previous: SymbolNode?
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init(_ title: String, _ children: [SymbolNode]? = nil) {
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init(_ title: String, _ children: [SymbolNode]? = nil, previous: SymbolNode? = nil) {
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self.title = title
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self.title = title
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self.children = children
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self.children = children
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self.previous = previous
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}
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}
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init(_ title: String, symbols: String) {
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init(_ title: String, symbols: String) {
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