def _parameters_exists_in_docstring(docstring: str) -> bool:
    """
    Get boolean of whether Parater part exists in docstring
    or not.

    Parameters
    ----------
    docstring : str
        Docstring to be checked.

    Returns
    -------
    result_bool : bool
        If exists, True will be set.
    """
    is_in: bool = 'Parameters\n    ---' in docstring
    if not is_in:
        return False
    return True