code: def of(self, *indented_blocks) -> "CodeBlock":
          
  
          if self.closed_by is None:
              self.expects_body_or_pass = True
  
          for block in indented_blocks:
              if block is not None:
                  self._blocks.append((1, block))
  
          # Finalise it so that we cannot add more sub-blocks to this block.
          self.finalise()
  
          return self
docs: By default, marks the block as expecting an indented "body" blocks of which are then supplied
          as arguments to this method.
  
          Unless the block specifies a "closed_by", if no body blocks are supplied or they are all Nones,
          this will generate a "pass" statement as the body. If there is a "closed_by" specified, then
          that will be used on the same indentation level as the opening of the block.
  
          After all the arguments have been handled, this block is marked as finalised and no more blocks
          can be appended to it.
  
          None blocks are skipped.
  
          Returns the block itself.