code: func NewBlockFromJSON(data string) (*Block, error) {
  	b := &Block{
  		block: new(types.Block),
  	}
  	if err := json.Unmarshal([]byte(data), b.block); err != nil {
  		return nil, err
  	}
  	return b, nil
  }
docs: // NewBlockFromJSON parses a block from a JSON data dump.