code: def _condensation_lil(self):
          
          condensation_lil = sparse.lil_matrix(
              (self.num_strongly_connected_components,
               self.num_strongly_connected_components), dtype=bool
          )
  
          scc_proj = self.scc_proj
          for node_from, node_to in _csr_matrix_indices(self.csgraph):
              scc_from, scc_to = scc_proj[node_from], scc_proj[node_to]
              if scc_from != scc_to:
                  condensation_lil[scc_from, scc_to] = True
  
          return condensation_lil
docs: Return the sparse matrix representation of the condensation digraph
          in lil format.