code: def resolve(cls, full_path):
          
          mod_path, _, app_path = full_path.partition(':')
          app = getattr(import_module(mod_path), app_path or 'application')
  
          with contextlib.suppress(TypeError):
              if issubclass(app, server.Gateway):
                  return GatewayYo(app)
  
          return cls(app)
docs: Read WSGI app/Gateway path string and import application module.