code: def _setextra(self, extradata):
          '''
          Set the _extra field in the struct, which stands for the additional ("extra") data after the
          defined fields.
          '''
          current = self
          while hasattr(current, '_sub'):
              current = current._sub
          _set(current, '_extra', extradataf _setextra(self, extradata):
          '''
          Set the _extra field in the struct, which stands for the additional ("extra") data after the
          defined fields.
          '''
          current = self
          while hasattr(current, '_sub'):
              current = current._sub
          _set(current, '_extra', extradata)
docs: Set the _extra field in the struct, which stands for the additional ("extra") data after the
          defined fields.