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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 get_webpack(request, name='DEFAULT'):
 """ Get the Webpack object for a given webpack config. Called at most once per request per config name. """

    if not hasattr(request, '_webpack_map'):
        request._webpack_map = {}
    wp = request._webpack_map.get(name)
    if wp is None:
        wp = request._webpack_map[name] = Webpack(request, name)
    return wp