code: func ContainerAssociationsHandler(state dockerstate.TaskEngineState) func(http.ResponseWriter, *http.Request) {
  	return func(w http.ResponseWriter, r *http.Request) {
  		containerID, err := getContainerIDByRequest(r, state)
  		if err != nil {
  			responseJSON, _ := json.Marshal(
  				fmt.Sprintf("V3 container associations handler: unable to get container id from request: %s", err.Error()))
  			utils.WriteJSONToResponse(w, http.StatusBadRequest, responseJSON, utils.RequestTypeContainerAssociations)
  			return
  		}
  
  		taskARN, err := getTaskARNByRequest(r, state)
  		if err != nil {
  			responseJSON, _ := json.Marshal(
  				fmt.Sprintf("V3 container associations handler: unable to get task arn from request: %s", err.Error()))
  			utils.WriteJSONToResponse(w, http.StatusBadRequest, responseJSON, utils.RequestTypeContainerAssociations)
  			return
  		}
  
  		associationType, err := getAssociationTypeByRequest(r)
  		if err != nil {
  			responseJSON, _ := json.Marshal(
  				fmt.Sprintf("V3 container associations handler: %s", err.Error()))
  			utils.WriteJSONToResponse(w, http.StatusBadRequest, responseJSON, utils.RequestTypeContainerAssociations)
  			return
  		}
  
  		seelog.Infof("V3 container associations handler: writing response for container '%s' for association type %s", containerID, associationType)
  
  		writeContainerAssociationsResponse(w, containerID, taskARN, associationType, state)
  	}
  }
docs: // ContainerAssociationHandler returns the handler method for handling container associations requests.