func (i *InmemStore) FirstIndex() (uint64, error) {
	i.l.RLock()
	defer i.l.RUnlock()
	return i.lowIndex, nil
}
func (i *InmemStore) FirstIndex() (uint64, error) {
	i.l.RLock()
	defer i.l.RUnlock()
	return i.lowIndex, nil
}
func ( i * InmemStore ) FirstIndex ( ) ( uint64 , error ) { i . l . RLock ( ) defer i . l . RUnlock ( ) return i . lowIndex , nil }
// FirstIndex implements the LogStore interface.
FirstIndex implements the LogStore interface .