@Override
	public void reportAttemptingFullContext(Parser recognizer,
											DFA dfa,
											int startIndex,
											int stopIndex,
											BitSet conflictingAlts,
											ATNConfigSet configs)
	{
		for (ANTLRErrorListener listener : delegates) {
			listener.reportAttemptingFullContext(recognizer, dfa, startIndex, stopIndex, conflictingAlts, configs);
		}
	}
This implementation of {@link ANTLRErrorListener} dispatches all calls to a
collection of delegate listeners. This reduces the effort required to support multiple
listeners.

@author Sam Harwell
runtime/Java/src/org/antlr/v4/runtime/ProxyErrorListener.java