code: def add_to_space_size(self, addition_bytes):
          # type: (int) -> None
          '''
          A method to add bytes to the space size tracked by this Volume
          Descriptor.
  
          Parameters:
           addition_bytes - The number of bytes to add to the space size.
          Returns:
           Nothing.
          '''
          if not self._initialized:
              raise pycdlibexception.PyCdlibInternalError('This Volume Descriptor is not yet initialized')
          # The 'addition' parameter is expected to be in bytes, but the space
          # size we track is in extents.  Round up to the next extent.
          self.space_size += utils.ceiling_div(addition_bytes, self.log_block_sizef add_to_space_size(self, addition_bytes):
          # type: (int) -> None
          '''
          A method to add bytes to the space size tracked by this Volume
          Descriptor.
  
          Parameters:
           addition_bytes - The number of bytes to add to the space size.
          Returns:
           Nothing.
          '''
          if not self._initialized:
              raise pycdlibexception.PyCdlibInternalError('This Volume Descriptor is not yet initialized')
          # The 'addition' parameter is expected to be in bytes, but the space
          # size we track is in extents.  Round up to the next extent.
          self.space_size += utils.ceiling_div(addition_bytes, self.log_block_size)
docs: A method to add bytes to the space size tracked by this Volume
          Descriptor.
  
          Parameters:
           addition_bytes - The number of bytes to add to the space size.
          Returns:
           Nothing.