public CodeActionEdit GetEdit(CancellationToken cancellationToken = new CancellationToken())
                {
                    // The updated solution, originally identical to the given solution instance.
                    ISolution updatedSolution = solution;

                    // Get all the documents
                    var solutionAnalyzer = AnalyzerFactory.GetSolutionAnalyzer();
                    solutionAnalyzer.SetSolution(solution);
                    var documents = solutionAnalyzer.GetAllDocuments();

                    // For each document
                    foreach (var document in documents)
                    {
                        // Get an invocation retriever and set the declaration and document.
                        var retriever = RetrieverFactory.GetMethodInvocationRetriever();
                        retriever.SetMethodDeclaration(declaration);
                        retriever.SetDocument(document);

                        // Get all the invocations in the document.
                        var invocations = retriever.GetInvocations();

                        // If there is some invocations of the given declaration in the specfic document
                        if (invocations.Any())
                        {
                            var rewriter = new MultipleInvocationsRewriter(invocations, mappings);
                            var updatedRoot = rewriter.Visit((SyntaxNode) document.GetSyntaxRoot());
                            updatedSolution = updatedSolution.UpdateDocument(document.Id, updatedRoot);
                        }
                    }
                    return new CodeActionEdit(updatedSolution);
                }
                public CodeActionEdit GetEdit(CancellationToken cancellationToken = new CancellationToken())
                {
                    // Get an invocation retriever and set the declaration and document.
                    var retriever = RetrieverFactory.GetMethodInvocationRetriever();
                    retriever.SetMethodDeclaration(declaration);
                    retriever.SetDocument(document);

                    // Get all the invocations in the document.
                    var invocations = retriever.GetInvocations();

                    // If there is some invocations of the given declaration in the specfic document
                    if (invocations.Any())
                    {
                        var rewriter = new MultipleInvocationsRewriter(invocations, mappings);
                        var updatedRoot = rewriter.Visit((SyntaxNode) document.GetSyntaxRoot());
                        var updatedSolution = document.Project.Solution.UpdateDocument(document.Id,
                            updatedRoot);

                        return new CodeActionEdit(null, updatedSolution, ConditionCheckersUtils.
                            GetRemoveCodeIssueComputerOperation(computer));
                    }
                    return null;
                }