code: def add(node, data):
      if not hasattr(node, "metadata"):
          node.metadata = Metadata()
          node._fields += ("metadata",)
      node.metadata.append(data)
  
file_path: pythran/pythran/metadata.py
imports: from gast import AST
label_desc: Use image node_id 1 for calling a global function with example usage: add(node, data) without return types