def METHOD_NAME(self, mounts_h):
    try:
        rs = self.svc.get_resourcesets("fs")[0]
    except IndexError:
        rs = None
    if rs is None:
        self.log.error("can not find fs resources encapsulating %s to snap (no fs resources)"%self.src)
        raise ex.syncNotSnapable
    for src in self.src:
        m = find_mount(rs, src)
        if m is None:
            self.log.error("can not find fs resources encapsulating %s to snap"%src)
            raise ex.syncNotSnapable
        mounts_h[src] = m
    return mounts_h