void (@NotNull PyFunction function) { final PyStringLiteralExpression docStringExpression = function.getDocStringExpression(); if (docStringExpression != null) { PySignatureCacheManager manager = PySignatureCacheManager.getInstance(function.getProject()); if (manager != null) { PySignature signature = manager.findSignature(function); if (signature != null) { checkParameters(function, docStringExpression, signature); } } } }