Compute metrics in the overview section for enriched git indexes.

    Returns a dictionary. Each key in the dictionary is the name of
    a metric, the value is the value of that metric. Value can be
    a complex object (eg, a time series).

    :param index: index object
    :param start: start date to get the data from
    :param end: end date to get the data upto
    :return: dictionary with the value of the metrics

def overview(index, start, end):
    """Compute metrics in the overview section for enriched git indexes.

    Returns a dictionary. Each key in the dictionary is the name of
    a metric, the value is the value of that metric. Value can be
    a complex object (eg, a time series).

    :param index: index object
    :param start: start date to get the data from
    :param end: end date to get the data upto
    :return: dictionary with the value of the metrics
    """

    results = {
        "activity_metrics": [Commits(index, start, end)],
        "author_metrics": [Authors(index, start, end)],
        "bmi_metrics": [],
        "time_to_close_metrics": [],
        "projects_metrics": []
    }

    return results