@Nullable
  private PropertiesFile getPropertyFileByPath(String path) {
    VirtualFile virtualFile = LocalFileSystem.getInstance().findFileByPath(path);
    return virtualFile != null
           ? PropertiesImplUtil.getPropertiesFile(PsiManager.getInstance(myProject).findFile(virtualFile))
           : null;
  }
@Nullable
  private PropertiesFile getPropertyFileByPath(String path)