parameters: (self)
docstring: Make sure that we are creating our binner & grouper.
docstring_summary: Make sure that we are creating our binner & grouper.
docstring_tokens: Make sure that we are creating our binner & grouper .
function: def _assure_grouper(self):
          """
          Make sure that we are creating our binner & grouper.
          """
          self._set_binner()
function_tokens: def _assure_grouper ( self ) : self . _set_binner ( )