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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 source_call(method_name, *args, **kwargs):
 """ Creates an effect that will drop the current effect value, call the source's method with specified name with the specified arguments and keywords. @param method_name: the name of method belonging to the source reference. @type method_name: str """


    def source_call(_value, context, **_params):
        method = getattr(context["model"].source, method_name)
        return _call(method, args, kwargs)

    return source_call