code: def n_forking_points(neurites, neurite_type=NeuriteType.all):
      '''number of forking points in a collection of neurites'''
      return n_sections(neurites, neurite_type=neurite_type, iterator_type=Tree.iforking_pointf n_forking_points(neurites, neurite_type=NeuriteType.all):
      '''number of forking points in a collection of neurites'''
      return n_sections(neurites, neurite_type=neurite_type, iterator_type=Tree.iforking_point)
docs: number of forking points in a collection of neurites