@Override
	public Handle lexerAltCommands(Handle alt, Handle cmds) {
		Handle h = new Handle(alt.left, cmds.right);
		epsilon(alt.right, cmds.left);
		return h;
	}
Maps from a {@link LexerAction} object to the action index.
tool/src/org/antlr/v4/automata/LexerATNFactory.java