@Override
	public int hashCode() {
		int hash = MurmurHash.initialize();
		hash = MurmurHash.update(hash, offset);
		hash = MurmurHash.update(hash, action);
		return MurmurHash.finish(hash, 2);
	}
{@inheritDoc}

<p>This method calls {@link #execute} on the result of {@link #getAction}
using the provided {@code lexer}.</p>
runtime/Java/src/org/antlr/v4/runtime/atn/LexerIndexedCustomAction.java