def METHOD_NAME(self, dataset_label):
    """Create new data set.
    Args:
        dataset_label (str): dataset label
    Returns:
        :obj:`PyRevitOutputChartDataset`: dataset wrapper object
    Example:
        >>> chart.data.new_dataset('set_a')
    """
    METHOD_NAME = PyRevitOutputChartDataset(dataset_label)
    self.datasets.append(METHOD_NAME)
    return METHOD_NAME