code: func (b *fileBootstrapper) GenesisBlock() *cb.Block {
  	bootstrapFile, fileErr := ioutil.ReadFile(b.GenesisBlockFile)
  	if fileErr != nil {
  		panic(errors.Errorf("unable to bootstrap orderer. Error reading genesis block file: %v", fileErr))
  	}
  	genesisBlock := &cb.Block{}
  	unmarshallErr := proto.Unmarshal(bootstrapFile, genesisBlock)
  	if unmarshallErr != nil {
  		panic(errors.Errorf("unable to bootstrap orderer. Error unmarshalling genesis block: %v", unmarshallErr))
  
  	}
  	return genesisBlock
  }
docs: // GenesisBlock returns the genesis block to be used for bootstrapping.