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// on the first call initialize priorVariables | |
if (priorVariables == null) { | |
priorVariables = new ArrayList<>(); | |
priorVariables.add(new String(chars, offset, length + lengthChange)); | |
} | |
// handle cyclic substitution | |
checkCyclicSubstitution(varName, priorVariables); | |
priorVariables.add(varName); |
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