code: public void onClickDir(@NonNull View view, @NonNull DirViewHolder viewHolder) {
          if (isDir(viewHolder.file)) {
              goToDir(viewHolder.file);
          }
      }
docs: Called when a non-selectable item, typically a directory, is clicked.
  
  @param view       that was clicked. Not used in default implementation.
  @param viewHolder for the clicked view