public PullRequestDiffViewModel Init(PullRequestFilesViewModel parentViewModel, PullRequestFile pullRequestFile)
 {
     PullRequestFile = pullRequestFile;
     ParentViewModel = parentViewModel;
     return this;
 }
 public PullRequestDiffViewModel Init(PullRequestFilesViewModel parentViewModel, PullRequestFile pullRequestFile)
 {
     PullRequestFile = pullRequestFile;
     ParentViewModel = parentViewModel;
     return(this);
 }