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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 to_query_parameters(parameters):
 """Converts DB-API parameter values into query parameters. :type parameters: Mapping[str, Any] or Sequence[Any] :param parameters: A dictionary or sequence of query parameter values. :rtype: List[google.cloud.bigquery.query._AbstractQueryParameter] :returns: A list of query parameters. """

    if parameters is None:
        return []

    if isinstance(parameters, collections_abc.Mapping):
        return to_query_parameters_dict(parameters)

    return to_query_parameters_list(parameters)