@Override
	/** Override to make type more specific */
	public ParserRuleContext getParent() {
		return (ParserRuleContext)super.getParent();
	}
Used by enterOuterAlt to toss out a RuleContext previously added as
 we entered a rule. If we have # label, we will need to remove
 generic ruleContext object.
runtime/Java/src/org/antlr/v4/runtime/ParserRuleContext.java