code: def get_known_transports():
      
      if not hasattr(get_known_transports, "cache"):
          setattr(
              get_known_transports,
              "cache",
              {
                  e.name: e.load()
                  for e in pkg_resources.iter_entry_points("workflows.transport")
              },
          )
      return get_known_transports.cache.copy()
docs: Return a dictionary of all known transport mechanisms.