message: add tree pattern to help visit
diff: @@ -1093,7 +1093,14 @@ void MFEMSidreDataCollection::Save(const std::string& filename,
  num_files = m_num_files;
  num_files = axom::utilities::clampUpper(num_files, num_procs);
  }
  - writer.write(temp_root, num_files, file_path, protocol);
  +
  + // Specifying the tree pattern helps visit display our data.
  + std::string tree_pattern = "datagroup";
  + if(num_files != num_procs)
  + {
  + tree_pattern = "datagroup_%07d";
  + }
  + writer.write(temp_root, num_files, file_path, protocol, tree_pattern);
  // Now that we've written the data, we can delete the temporary group
  temp_root->getParent()->destroyGroup("_sidre_tmp_save");
  