text: public Collection<ParseTree> evaluate(ParseTree t) {List<ParseTree> nodes = new ArrayList<ParseTree>();for (Tree c : Trees.getChildren(t)) {if ( c instanceof ParserRuleContext ) {ParserRuleContext ctx = (ParserRuleContext)c;if ( (ctx.getRuleIndex() == ruleIndex && !invert) ||(ctx.getRuleIndex() != ruleIndex && invert) ){nodes.add(ctx);}}}return nodes;}