docs: def create_submission_parameter(self, name, default=None, type_=None):
          """ Create a submission parameter.
  
          A submission parameter is a handle for a value that
          is not defined until topology submission time.  Submission
          parameters enable the creation of reusable topology bundles.
   
          A submission parameter has a `name`. The name must be unique
          within the topology.
  
          The returned parameter is a `callable`.
          Prior to submitting the topology, while constructing the topology,
          invoking it returns ``None``.
   
          After the topology is submitted, invoking the parameter
          within the executing topology returns the actual submission time value
          (or the default value if it was not set at submission time).
  
          Submission parameters may be used within functional logic. e.g.::
  
              threshold = topology.create_submission_parameter('threshold', 100);
  
              # s is some stream of integers
              s = ...
              s = s.filter(lambda v : v > threshold())
  
          .. note::
              The parameter (value returned from this method) is only
              supported within a lambda expression or a callable
              that is not a function.
  
          The default type of a submission parameter's value is a `str`
          (`unicode` on Python 2.7). When a `default` is specified
          the type of the value matches the type of the default.
  
          If `default` is not set, then the type can be set with `type_`.
  
          The types supported are ``str``, ``int``, ``float`` and ``bool``.
  
          Topology submission behavior when a submission parameter 
          lacking a default value is created and a value is not provided at
          submission time is defined by the underlying topology execution runtime.
  
             * Submission fails for contexts ``DISTRIBUTED``, ``STANDALONE``, and ``STREAMING_ANALYTICS_SERVICE``.
  
          Args:
              name(str): Name for submission parameter.
              default: Default parameter when submission parameter is not set.
              type_: Type of parameter value when default is not set. Supported values are `str`, `int`, `float` and `bool`.
  
          .. versionadded:: 1.9
          """
          
          if name in self._submission_parameters:
              raise ValueError("Submission parameter {} already defined.".format(name))
          sp = streamsx.topology.runtime._SubmissionParam(name, default, type_)
          self._submission_parameters[name] = sp
          return sp