@Override
	public int getAltNumber() {
		// override here and called old functionality; makes it backward compatible vs changing names
		return getOuterAltNum();
	}
The predicted outermost alternative for the rule associated
 with this context object.  If this node left recursive, the true original
 outermost alternative is returned.
tool/src/org/antlr/v4/tool/GrammarInterpreterRuleContext.java