agent/engine/dockerstate/docker_task_engine_state.go
func (state *DockerTaskEngineState) TaskARNByV3EndpointID(v3EndpointID string) (string, bool) {
	state.lock.RLock()
	defer state.lock.RUnlock()

	taskArn, ok := state.v3EndpointIDToTask[v3EndpointID]
	return taskArn, ok
}
func (state *DockerTaskEngineState) TaskARNByV3EndpointID(v3EndpointID string) (string, bool) {
	state.lock.RLock()
	defer state.lock.RUnlock()

	taskArn, ok := state.v3EndpointIDToTask[v3EndpointID]
	return taskArn, ok
}
// TaskARNByV3EndpointID returns a taskARN for a given v3 endpoint ID