private async Task <Document> RefactorAsync(
Document document,
CancellationToken cancellationToken = default(CancellationToken))
{
SyntaxNode root = await document.GetSyntaxRootAsync(cancellationToken).ConfigureAwait(false);
ConstructorDeclarationSyntax constructor = Constructor;
MemberDeclarationSyntax containingMember = constructor.GetParentMember();
SyntaxList <MemberDeclarationSyntax> members = containingMember.GetMembers();
SyntaxList <MemberDeclarationSyntax> newMembers = members.Replace(
constructor,
constructor.AddBodyStatements(CreateAssignments().ToArray()));
newMembers = newMembers.InsertRange(
GetDeclarationIndex(members),
CreateDeclarations());
SyntaxNode newRoot = root.ReplaceNode(
containingMember,
containingMember.SetMembers(newMembers));
return(document.WithSyntaxRoot(newRoot));
}