code: def get_correlation_triangles(graph: BELGraph) -> SetOfNodeTriples:
      
      return {
          tuple(sorted([n, u, v], key=str))
          for n in graph
          for u, v in itt.combinations(graph[n], 2)
          if graph.has_edge(u, v)
      }
docs: Return a set of all triangles pointed by the given node.