code: def map_pores(self, pores, origin, filtered=True):
          r
          ids = origin['pore._id'][pores]
          return self._map(element='pore', ids=ids, filtered=filtered)
docs: r"""
          Given a list of pore on a target object, finds indices of those pores
          on the calling object
  
          Parameters
          ----------
          pores : array_like
              The indices of the pores on the object specifiedin ``origin``
  
          origin : OpenPNM Base object
              The object corresponding to the indices given in ``pores``
  
          filtered : boolean (default is ``True``)
              If ``True`` then a ND-array of indices is returned with missing
              indices removed, otherwise a named-tuple containing both the
              ``indices`` and a boolean ``mask`` with ``False`` indicating
              which locations were not found.
  
          Returns
          -------
          Pore indices on the calling object corresponding to the same pores
          on the ``origin`` object.  Can be an array or a tuple containing an
          array and a mask, depending on the value of ``filtered``.