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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 usingCurl():
 """Whether the currently set HTTP fetcher is a Curl HTTP fetcher."""

    fetcher = getDefaultFetcher()
    if isinstance(fetcher, ExceptionWrappingFetcher):
        fetcher = fetcher.fetcher
    return isinstance(fetcher, CurlHTTPFetcher)