void (PyCallExpression node, String nameBeingExtended) { PyExpression arg = node.getArguments()[0]; Object value = myEvaluationResult.myNamespace.get(nameBeingExtended); if (value instanceof List) { Object argValue = prepareEvaluator().evaluate(arg); myEvaluationResult.myNamespace.put(nameBeingExtended, prepareEvaluator().applyPlus(value, argValue)); } if (myDeclarationsToTrack.contains(nameBeingExtended)) { List<PyExpression> declarations = myEvaluationResult.myDeclarations.get(nameBeingExtended); if (declarations != null) { PyPsiUtils.sequenceToList(declarations, arg); } } }