private Diagnostic HandleMethod(MethodDeclarationSyntax methodDeclaration)
        {
            if (methodDeclaration.ExpressionBody != null)
            {
                return null;
            }

            if (methodDeclaration.DescendantNodesAndTokensAndSelf().Any(x => x.GetLeadingTrivia().Concat(x.GetTrailingTrivia()).Any(y => !y.IsWhitespaceTrivia())))
            {
                return null;
            }

            if (methodDeclaration.Body?.Statements.Count != 1)
            {
                return null;
            }

            var statement = methodDeclaration.Body.Statements.FirstOrDefault();
            var returnStatement = statement?.DescendantNodesAndSelf().OfType<ReturnStatementSyntax>().FirstOrDefault();
            if (returnStatement == null)
            {
                return null;
            }

            return Diagnostic.Create(Rule, returnStatement.GetLocation(), "Method", methodDeclaration.Identifier.ValueText);
        }