@Override
    public void visitPyFunction(@NotNull PyFunction node) {
      if (isBuiltin(node)) return;
      final PyClass containingClass = node.getContainingClass();
      if (containingClass == null) return;
      final PsiElement firstSuper = PySuperMethodsSearch.search(node, myTypeEvalContext).findFirst();
      if (firstSuper != null) return;
      final PyFunction firstOverride = PyOverridingMethodsSearch.search(node, true).findFirst();
      if (firstOverride != null) return;
      final PyDecoratorList decoratorList = node.getDecoratorList();
      if (decoratorList != null) return;
      if (node.getModifier() != null) return;
      final Property property = containingClass.findPropertyByCallable(node);
      if (property != null) return;
      final List<PyAssignmentStatement> attributes = node.findAttributes();
      if (!attributes.isEmpty()) return;
      if (isTestElement(node)) return;

      if (PyUtil.isEmptyFunction(node)) return;

      final PyParameter[] parameters = node.getParameterList().getParameters();

      final String selfName;
      if (parameters.length > 0) {
        final String name = parameters[0].getName();
        selfName = name != null ? name : parameters[0].getText();
      }
      else {
        selfName = PyNames.CANONICAL_SELF;
      }

      final boolean[] mayBeStatic = {true};
      PyRecursiveElementVisitor visitor = new PyRecursiveElementVisitor() {
        @Override
        public void visitPyRaiseStatement(@NotNull PyRaiseStatement node) {
          super.visitPyRaiseStatement(node);
          final PyExpression[] expressions = node.getExpressions();
          if (expressions.length == 1) {
            final PyExpression expression = expressions[0];
            if (expression instanceof PyCallExpression) {
              final PyExpression callee = ((PyCallExpression)expression).getCallee();
              if (callee != null && PyNames.NOT_IMPLEMENTED_ERROR.equals(callee.getText()))
                mayBeStatic[0] = false;
            }
            else if (PyNames.NOT_IMPLEMENTED_ERROR.equals(expression.getText())) {
              mayBeStatic[0] = false;
            }
          }
        }

        @Override
        public void visitPyReferenceExpression(@NotNull PyReferenceExpression node) {
          if (node.isQualified()) {
            super.visitPyReferenceExpression(node);
          }
          else if (selfName.equals(node.getName())) {
            mayBeStatic[0] = false;
          }
        }

        @Override
        public void visitPyCallExpression(@NotNull PyCallExpression node) {
          super.visitPyCallExpression(node);
          if (!LanguageLevel.forElement(node).isPython2() && node.isCalleeText(PyNames.SUPER)) {
            mayBeStatic[0] = false;
          }
        }
      };
      node.accept(visitor);
      final PsiElement identifier = node.getNameIdentifier();
      if (mayBeStatic[0] && identifier != null) {
        registerProblem(identifier, PyPsiBundle.message("INSP.method.may.be.static"), ProblemHighlightType.WEAK_WARNING,
                        null, new PyMakeMethodStaticQuickFix(), new PyMakeFunctionFromMethodQuickFix());
      }
    }
@Override
    public void visitPyFunction(@NotNull PyFunction node)