code: def convert_to_string(idx_list, form_manager):
      w_list = []
      for i in range(len(idx_list)):
          w_list.append(form_manager.get_idx_symbol(int(idx_list[i])))
      return " ".join(w_list)
  
imports: from graph4nlp.pytorch.modules.utils.tree_utils import Tree
label_desc: Use image node_id 1 for calling a global function with example usage: convert_to_string(idx_list, form_manager) and returns: str