agent/engine/dockerstate/docker_task_engine_state.go
func (state *DockerTaskEngineState) ENIByMac(mac string) (*apieni.ENIAttachment, bool) {
	state.lock.RLock()
	defer state.lock.RUnlock()

	eni, ok := state.eniAttachments[mac]
	return eni, ok
}
func (state *DockerTaskEngineState) ENIByMac(mac string) (*apieni.ENIAttachment, bool) {
	state.lock.RLock()
	defer state.lock.RUnlock()

	eni, ok := state.eniAttachments[mac]
	return eni, ok
}
// ENIByMac returns the eni object that match the give mac address