public void doit(SearchingCodeVisitor visitor, MethodCallExpression call) { // Recognize and handle <methodName>(..., <argName>: "<oldName>", ...) MapEntryExpression arg = SearchUtil.getNamedArgument(call, argName); if (arg != null) { final Expression valueExpression = arg.getValueExpression(); String argValue = SearchUtil.getStringValue(valueExpression); if (oldValue.equals(argValue)) { matchFound(visitor, call, valueExpression); } } }