code: def make_snapshot( cls, serialized_ops, prev_consensus_hashes ):
          
          record_root_hash = StateEngine.make_ops_snapshot( serialized_ops )
          log.debug("Snapshot('{}', {})".format(record_root_hash, prev_consensus_hashes))
          return (cls.make_snapshot_from_ops_hash( record_root_hash, prev_consensus_hashes ), record_root_hash)
docs: Generate a consensus hash, using the tx-ordered list of serialized name 
          operations, and a list of previous consensus hashes that contains
          the (k-1)th, (k-2)th; (k-3)th; ...; (k - (2**i - 1))th consensus hashes, 
          all the way back to the beginning of time (prev_consensus_hashes[i] is the 
          (k - (2**(i+1) - 1))th consensus hash)
  
          Returns (consensus_hash, ops_hash)