code: def serialize(self):
      return {"bit_map": np.asarray(self.bit_map, dtype=np.float32)}
  
imports: from cntk import *
  from cntk.ops.functions import UserFunction
  import numpy
  import cntk
label_desc: Use image node_id 7 for calling the Multibit obj's underlying member method code with example usage: obj.serialize() and returns: dict