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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_docstring(target) -> str: """ Retrieves the documentation string from the target object and returns it after removing insignificant whitespace :param target: The object for which the doc string should be retrieved :return: The cleaned documentation string for the target. If no doc string exists an empty string will be returned instead. """


    raw = getattr(target, '__doc__')

    if raw is None:
        return ''

    return textwrap.dedent(raw)