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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def handle(self, handler, req, resp, **kwargs):
 """Handle given resource manipulation flow in consistent manner. This mixin is intended to be used only as a base class in new flow mixin classes. It ensures that regardless of resource manunipulation semantics (retrieve, get, delete etc.) the flow is always the same: 1. Decode and validate all request parameters from the query string using ``self.require_params()`` method. 2. Use ``self.require_meta_and_content()`` method to construct ``meta`` and ``content`` dictionaries that will be later used to create serialized response body. 3. Construct serialized response body using ``self.body()`` method. Args: handler (method):
 resource manipulation method handler. req (falcon.Request):
 request object instance. resp (falcon.Response):
 response object instance to be modified. **kwargs: additional keyword arguments retrieved from url template. Returns: Content dictionary (preferably resource representation). """

        params = self.require_params(req)

        # future: remove in 1.x
        if getattr(self, '_with_context', False):
            handler = partial(handler, context=req.context)

        meta, content = self.require_meta_and_content(
            handler, params, **kwargs
        )
        self.make_body(resp, params, meta, content)
        return content