code: def serialize(node, stream=None, Dumper=Dumper, **kwds):
      """
      Serialize a representation tree into a YAML stream.
      If stream is None, return the produced string instead.
      """
      return serialize_all([node], stream, Dumper=Dumper, **kwds)
  
imports: from error import *
  from tokens import *
  from events import *
  from nodes import *
  from loader import *
  from dumper import *
label_desc: Use image node_id 17 for calling a global function with example usage: serialize(node, stream, Dumper) and returns: serialize_all