docs: def add_toolkit(topology, location):
      """Add an SPL toolkit to a topology.
  
      Args:
          topology(Topology): Topology to include toolkit in.
          location(str): Location of the toolkit directory.
      """
      import streamsx.topology.topology
      assert isinstance(topology, streamsx.topology.topology.Topology)
      tkinfo = dict()
      tkinfo['root'] = os.path.abspath(location)
      topology.graph._spl_toolkits.append(tkinfo)