def getFiledAgainsts(self, projectarea_id=None, projectarea_name=None,
                         archived=False):
        """Get all :class:`rtcclient.models.FiledAgainst` objects by
        project area id or name

        If both `projectarea_id` and `projectarea_name` are `None`,
        all the filedagainsts in all project areas will be returned.

        If no :class:`rtcclient.models.FiledAgainst` objects are retrieved,
        `None` is returned.

        :param projectarea_id: the :class:`rtcclient.project_area.ProjectArea`
            id
        :param projectarea_name: the project area name
        :param archived: (default is False) whether the filedagainsts are
            archived
        :return: a :class:`list` that contains all the
            :class:`rtcclient.models.FiledAgainst` objects
        :rtype: list
        """

        return self._getFiledAgainsts(projectarea_id=projectarea_id,
                                      projectarea_name=projectarea_name,
                                      archived=archived)