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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 build_swagger_12_api_declaration_view(api_declaration_json):
 """Thanks to the magic of closures, this means we gracefully return JSON without file IO at request time. """

    def view_for_api_declaration(request):
        # Note that we rewrite basePath to always point at this server's root.
        return dict(
            api_declaration_json,
            basePath=str(request.application_url),
        )
    return view_for_api_declaration