docs: def remove_segments(self, segments_to_remove):
          ''' Remove the faces and vertices for given segments, keeping all others.
  
          Args:
              segments_to_remove: a list of segnments whose vertices will be removed
          '''
          v_ind = self.vertex_indices_in_segments(segments_to_remove)
          self.segm = {name: faces for name, faces in self.segm.iteritems() if name not in segments_to_remove}
          self.remove_vertices(v_ind)