def METHOD_NAME(obj):
    """
    Get object docstring without leading whitespace.
    :param obj: Object to be extracted docstring.
    :type obj: ``object``
    :return: Docstring of the object.
    :rtype: ``str`` or ``NoneType``
    """
    if hasattr(obj, "__doc__"):
        if obj.__doc__:
            return inspect.cleandoc(obj.__doc__)
    return None