@Override
	public void actionInAlt(ActionAST action) {
		currentRule.defineActionInAlt(currentOuterAltNumber, action);
		action.resolver = currentRule.alt[currentOuterAltNumber];
	}
Track action name node in @parser::members {...} or @members {...}
tool/src/org/antlr/v4/semantics/SymbolCollector.java