@Nullable
  private String getSourceDirectoryPath() {
    final String contentEntryPath = getContentRootPath();
    if (contentEntryPath != null) {
      final String dirName = myTfSourceDirectoryName.getText().trim().replace(File.separatorChar, '/');
      return !dirName.isEmpty() ? contentEntryPath + "/" + dirName : contentEntryPath;
    }
    return null;
  }
@Nullable
  private String getSourceDirectoryPath()