 found duplicate it will return index > -1
                    if (!this.editMachines) {
                        this.editMachines = []
                    }
                    let isDuplicated = this.editMachines.map(item => item.number).indexOf(selector.selectedItem
                        .number) > -1

                    if (this.editMachines.length < this.stationMaxMachine) {
                        if (isDuplicated) {
                            this.toastText = 'notification-already-added-this-mach