code: def _plot_connectivity(self, A, data=None, lims=[None, None]):
          
  
          if data is None:
              data = self.data
  
          B = A.tocoo()
          self._plot_connectivity_helper(B.col, B.row, B.data, data, lims)
docs: A debug function used to plot the adjacency/connectivity matrix.
          This is really just a light wrapper around _plot_connectivity_helper