docs: def create_wsgi_factory(mounts_factories):
      """Create a WSGI application factory.
  
      Usage example:
  
      .. code-block:: python
  
         wsgi_factory = create_wsgi_factory({'/api': create_api})
  
      :param mounts_factories: Dictionary of mount points per application
          factory.
  
      .. versionadded:: 1.0.0
      """
      def create_wsgi(app, **kwargs):
          mounts = {
              mount: factory(**kwargs)
              for mount, factory in mounts_factories.items()
          }
          return DispatcherMiddleware(app.wsgi_app, mounts)
      return create_wsgi