private void initPsiFiles() {
    if (myProject == null) return;
    ArrayList<PsiFile> files = new ArrayList<>();
    for (ThreeSide value : ThreeSide.values()) {
      PsiFile psiFile = getPsiFile(value, myProject, myMergeRequest);
      if (psiFile != null) {
        files.add(psiFile);
      }
    }
    myPsiFiles = files;
  }
private void initPsiFiles()