public BitSet getAlts() {
		BitSet alts = new BitSet();
		for (ATNConfig config : configs) {
			alts.set(config.alt);
		}
		return alts;
	}
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