def getMemberDataContents():
    """ Returns a list containing a dictionary with information
        about the _members BTree contents

        o The key 'member_count' is the total number of member instances
          stored in the memberdata-tool

        o The key 'orphan_count' is the number of member instances
          that for are no longer in the underlying acl_users user folder.

        o The result is designed to be iterated over in a dtml-in

        o ???:  why a sequence?

        o Permission:  Private (Python-only)
        """
