def getHistory(obj, oldestFirst=False, preserve=(), countPurged=True):
    """Returns the history of a content.

        Return the oldest version first  when ``oldestFirst`` set to
        ``True``. Default is ``False`` (youngest version first).

        Returns a sequence (``IHistory``) of ``IVersionData`` objects.

        Also counts purged versions if ``True`` is passed to ``countPurged``
        (see interface documentation for details).
        """
