// Copyright 2019 Lunny Xiao. All rights reserved.
// Use of this source code is governed by a MIT-style
// license that can be found in the LICENSE file.
package levelqueue
import "errors"
var (
// ErrNotFound means no elements in queue
ErrNotFound = errors.New("no key found")
ErrAlreadyInQueue = errors.New("value already in queue")
)
