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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 _converter(data):
 """Internal function that will be passed to the native `json.dumps`. This function uses the `REGISTRY` of serializers and try to convert a given instance to an object that json.dumps can understand. """

    handler = REGISTRY.get(data.__class__)
    if handler:
        full_name = '{}.{}'.format(
            data.__class__.__module__,
            data.__class__.__name__)
        return {
            '__class__': full_name,
            '__value__': handler(data),
        }
    raise TypeError(repr(data) + " is not JSON serializable")