def get_shader_obj(self, pass_id):
        """ Returns a handle to the compiled shader object for a given render
        pass. """
        if pass_id not in self._shader_objs:
            self.warn("Pass '" + pass_id + "' not found!")
            return False
        return self._shader_objs[pass_id]
 Returns a handle to the compiled shader object for a given render
        pass. 
metadrive/render_pipeline/rpcore/effect.py