@Override
	public int hashCode() {
		if (isReadonly()) {
			if (cachedHashCode == -1) {
				cachedHashCode = configs.hashCode();
			}

			return cachedHashCode;
		}

		return configs.hashCode();
	}
Gets the complete set of represented alternatives for the configuration
set.

@return the set of represented alternatives in this configuration set

@since 4.3
runtime/Java/src/org/antlr/v4/runtime/atn/ATNConfigSet.java