You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: services.go
    path of file: ./repos/docker-ce/components/engine/vendor/github.com/docker/swarmkit/manager/orchestrator/replicated
    
    the code of the file until where you have to start completion: package replicated

import (
	"context"
	"sort"

	"github.com/docker/go-events"
	"github.com/docker/swarmkit/api"
	"github.com/docker/swarmkit/log"
	"github.com/docker/swarmkit/manager/orchestrator"
	"github.com/docker/swarmkit/manager/state/store"
)

// This file provices service-level orchestration. It observes changes to
// services and creates and destroys tasks as necessary to match the service
// speci
    
func (r *Orchestrator) addTasks(ctx context.Context, batch *store.Batch, service *api.Service, runningSlots map[uint64]orchestrator.Slot, deadSlots map[uint64]orchestrator.Slot, count uint64) {
	slot := uint64(0)
	for i := uint64(0); i < count; i++ {
		// Find a slot number that is missing a running task
		for {
			slot++
			if _, ok := runningSlots[slot]; !ok {
				break
			}
		}

		delete(deadSlots, slot)
		err := batch.Update(func(tx store.Tx) error {
			return store.CreateTask(tx, orchestrator.NewTask(r.cluster, service, slot, ""))
		})
		if err != nil {
			log.G(ctx).Errorf("Failed to create task: %v", err)
		}
	}
}