class_docstr: Map container of DGL.
  
  You do not need to create Map explicitly.
  Normally python dict will be converted automaticall to Map during dgl function call.
  You can use convert to create a dict[ObjectBase-> ObjectBase] into a Map
class_docstr_tok: ["Map","container","of","DGL",".","You","do","not","need","to","create","Map","explicitly",".","Normally","python","dict","will","be","converted","automaticall","to","Map","during","dgl","function","call",".","You","can","use","convert","to","create","a","dict","[","ObjectBase-",">","ObjectBase","]","into","a","Map"]
code: def __contains__(self, k):
      return _api_internal._MapCount(self, k) != 0
  
imports: from __future__ import absolute_import
  from .None import _api_internal
  from ._ffi.object import ObjectBase, register_object
  from ._ffi.object_generic import convert_to_object
label_desc: Use image node_id 2 for calling the Map obj's underlying member method code with example usage: obj.__contains__(k) and returns: unknown