code: def bytes_block_cast(block,
                       include_text=True,
                       include_link_tokens=True,
                       include_css=True,
                       include_features=True,
                       **kwargs):
      
      if include_text:
          block.text = bytes_cast(block.text, **kwargs)
      if include_link_tokens:
          block.link_tokens = bytes_list_cast(block.link_tokens, **kwargs)
      if include_css:
          block.css = bytes_dict_cast(block.css, **kwargs)
      if include_features:
          block.features = bytes_dict_cast(block.features, **kwargs)
      return block
docs: Converts any string-like items in input Block object to bytes-like values,
      with respect to python version
  
      Parameters
      ----------
      block : blocks.Block
          any string-like objects contained in the block object will be converted
          to bytes
      include_text : bool, default=True
          if True, cast text to bytes, else ignore
      include_link_tokens : bool, default=True
          if True, cast link_tokens to bytes, else ignore
      include_css : bool, default=True
          if True, cast css to bytes, else ignore
      include_features : bool, default=True
          if True, cast features to bytes, else ignore
      kwargs:
          encoding: str, default: 'utf-8'
              encoding to be used when encoding string