@Override
 public boolean isFileVisible(VirtualFile file, boolean showHiddenFiles) {
   if (!super.isFileVisible(file, showHiddenFiles)) {
     return false;
   }
   return file.isDirectory() || GradleConstants.DEFAULT_SCRIPT_NAME.equals(file.getName());
 }
 @Override
 public boolean isFileSelectable(VirtualFile file) {
   return GradleConstants.DEFAULT_SCRIPT_NAME.equals(file.getName());
 }