code: def get_subgraph_for_concept_pairs(
          self, concepts: List[str], cutoff: Optional[int] = None
      ):
          
          path_generator = (
              nx.all_simple_paths(self, source, target, cutoff=cutoff)
              for source, target in permutations(concepts, 2)
          )
          paths = chain.from_iterable(path_generator)
          return AnalysisGraph(self.subgraph(set(chain.from_iterable(paths))))
docs: Get subgraph comprised of simple paths between the source and the
          target.
  
          Args:
              concepts
              cutoff