DiagnosticErrorListener.getConflictingAlts

Computes the set of conflicting or ambiguous alternatives from a configuration set, if that information was not already provided by the parser.

@param reportedAlts The set of conflicting or ambiguous alternatives, as reported by the parser. @param configs The conflicting or ambiguous configuration set. @return Returns {@code reportedAlts} if it is not {@code null}, otherwise returns the set of alternatives represented in {@code configs}.

class DiagnosticErrorListener(U, V)
protected
getConflictingAlts

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