code: def Header(self):
          
          if not self._header:
              self._header = Header(self.PrevHash, self.MerkleRoot, self.Timestamp,
                                    self.Index, self.ConsensusData, self.NextConsensus, self.Script)
  
          return self._header
docs: Get the block header.
  
          Returns:
              neo.Core.Header: