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This is necessary because we cannot determine an\n     * appropriate chip that should receive focus until the array of chips updated completely.\n     */\n    private _lastDestroyedChipIndex;\n    /** Subject that emits when the component has been destroyed. */\n    private readonly _destroyed;\n    /** Subscription to focus changes in the chips. */\n    private _chipFocusSubscription;\n    /** Subscription to blur changes in the chips. */\n    private _chipBlurSubscription;\n    /** Subscription to selection changes in chips. */\n    private _chipSelectionSubscription;\n    /** Subscription to remove changes in chips. */\n    private _chipRemoveSubscription;\n    /** The chip input to add more chips */\n    protected _chipInput: MatChipTextControl;\n    /** Uid of the chip list */\n    _uid: string;\n    /** The aria-describedby attribute on the chip list for improved a11y. */\n    _ariaDescribedby: string;\n    /** Tab index for the chip list. */\n    _tabIndex: number;\n    /**\n     * User defined tab index.\n     * When it is not null, use user defined tab index. Otherwise use _tabIndex\n     */\n    _userTabIndex: number | null;\n    /** The FocusKeyManager which handles focus. */\n    _keyManager: FocusKeyManager<MatChip>;\n    /** Function when touched */\n    _onTouched: () => void;\n    /** Function when changed */\n    _onChange: (value: any) => void;\n    _selectionModel: SelectionModel<MatChip>;\n    /** The array of selected chips inside chip list. */\n    get selected(): MatChip[] | MatChip;\n    /** The ARIA role applied to the chip list. */\n    get role(): string | null;\n    /** An object used to control when error messages are shown. */\n    errorStateMatcher: ErrorStateMatcher;\n    /** Whether the user should be allowed to select multiple chips. */\n    get multiple(): boolean;\n    set multiple(value: boolean);\n    private _multiple;\n    /**\n     * A function to compare the option values with the selected values. The first argument\n     * is a value from an option. The second is a value from the selection. A boolean\n     * should be returned.\n     */\n    get compareWith(): (o1: any, o2: any) => boolean;\n    set compareWith(fn: (o1: any, o2: any) => boolean);\n    private _compareWith;\n    /**\n     * Implemented as part of MatFormFieldControl.\n     * @docs-private\n     */\n    get value(): any;\n    set value(value: any);\n    protected _value: any;\n    /**\n     * Implemented as part of MatFormFieldControl.\n     * @docs-private\n     */\n    get id(): string;\n    /**\n     * Implemented as part of MatFormFieldControl.\n     * @docs-private\n     */\n    get required(): boolean;\n    set required(value: boolean);\n    protected _required: boolean;\n    /**\n     * Implemented as part of MatFormFieldControl.\n     * @docs-private\n     */\n    get placeholder(): string;\n    set placeholder(value: string);\n    protected _placeholder: string;\n    /** Whether any chips or the matChipInput inside of this chip-list has focus. */\n    get focused(): boolean;\n    /**\n     * Implemented as part of MatFormFieldControl.\n     * @docs-private\n     */\n    get empty(): boolean;\n    /**\n     * Implemented as part of MatFormFieldControl.\n     * @docs-private\n     */\n    get shouldLabelFloat(): boolean;\n    /**\n     * Implemented as part of MatFormFieldControl.\n     * @docs-private\n     */\n    get disabled(): boolean;\n    set disabled(value: boolean);\n    protected _disabled: boolean;\n    /** Orientation of the chip list. */\n    ariaOrientation: 'horizontal' | 'vertical';\n    /**\n     * Whether or not this chip list is selectable. When a chip list is not selectable,\n     * the selected states for all the chips inside the chip list are always ignored.\n     */\n    get selectable(): boolean;\n    set selectable(value: boolean);\n    protected _selectable: boolean;\n    set tabIndex(value: number);\n    /** Combined stream of all of the child chips' selection change events. */\n    get chipSelectionChanges(): Observable<MatChipSelectionChange>;\n    /** Combined stream of all of the child chips' focus change events. */\n    get chipFocusChanges(): Observable<MatChipEvent>;\n    /** Combined stream of all of the child chips' blur change events. */\n    get chipBlurChanges(): Observable<MatChipEvent>;\n    /** Combined stream of all of the child chips' remove change events. */\n    get chipRemoveChanges(): Observable<MatChipEvent>;\n    /** Event emitted when the selected chip list value has been changed by the user. */\n    readonly change: EventEmitter<MatChipListChange>;\n    /**\n     * Event that emits whenever the raw value of the chip-list changes. This is here primarily\n     * to facilitate the two-way binding for the `value` input.\n     * @docs-private\n     */\n    readonly valueChange: EventEmitter<any>;\n    /** The chip components contained within this chip list. */\n    chips: QueryList<MatChip>;\n    constructor(_elementRef: ElementRef<HTMLElement>, _changeDetectorRef: ChangeDetectorRef, _dir: Directionality, _parentForm: NgForm, _parentFormGroup: FormGroupDirective, _defaultErrorStateMatcher: ErrorStateMatcher, ngControl: NgControl);\n    ngAfterContentInit(): void;\n    ngOnInit(): void;\n    ngDoCheck(): void;\n    ngOnDestroy(): void;\n    /** Associates an HTML input element with this chip list. */\n    registerInput(inputElement: MatChipTextControl): void;\n    /**\n     * Implemented as part of MatFormFieldControl.\n     * @docs-private\n     */\n    setDescribedByIds(ids: string[]): void;\n    writeValue(value: any): void;\n    registerOnChange(fn: (value: any) => void): void;\n    registerOnTouched(fn: () => void): void;\n    setDisabledState(isDisabled: boolean): void;\n    /**\n     * Implemented as part of MatFormFieldControl.\n     * @docs-private\n     */\n    onContainerClick(event: MouseEvent): void;\n    /**\n     * Focuses the first non-disabled chip in this chip list, or the associated input when there\n     * are no eligible chips.\n     */\n    focus(options?: FocusOptions): void;\n    /** Attempt to focus an input if we have one. */\n    _focusInput(options?: FocusOptions): void;\n    /**\n     * Pass events to the keyboard manager. Available here for tests.\n     */\n    _keydown(event: KeyboardEvent): void;\n    /**\n     * Check the tab index as you should not be allowed to focus an empty list.\n     */\n    protected _updateTabIndex(): void;\n    /**\n     * If the amount of chips changed, we need to update the\n     * key manager state and focus the next closest chip.\n     */\n    protected _updateFocusForDestroyedChips(): void;\n    /**\n     * Utility to ensure all indexes are valid.\n     *\n     * @param index The index to be checked.\n     * @returns True if the index is valid for our list of chips.\n     */\n    private _isValidIndex;\n    _setSelectionByValue(value: any, isUserInput?: boolean): void;\n    /**\n     * Finds and selects the chip based on its value.\n     * @returns Chip that has the corresponding value.\n     */\n    private _selectValue;\n    private _initializeSelection;\n    /**\n     * Deselects every chip in the list.\n     * @param skip Chip that should not be deselected.\n     */\n    private _clearSelection;\n    /**\n     * Sorts the model values, ensuring that they keep the same\n     * order that they have in the panel.\n     */\n    private _sortValues;\n    /** Emits change event to set the model value. */\n    private _propagateChanges;\n    /** When blurred, mark the field as touched when focus moved outside the chip list. */\n    _blur(): void;\n    /** Mark the field as touched */\n    _markAsTouched(): void;\n    /**\n     * Removes the `tabindex` from the chip list and resets it back afterwards, allowing the\n     * user to tab out of it. This prevents the list from capturing focus and redirecting\n     * it back to the first chip, creating a focus trap, if it user tries to tab away.\n     */\n    _allowFocusEscape(): void;\n    private _resetChips;\n    private _dropSubscriptions;\n    /** Listens to user-generated selection events on each chip. */\n    private _listenToChipsSelection;\n    /** Listens to user-generated selection events on each chip. */\n    private _listenToChipsFocus;\n    private _listenToChipsRemoved;\n    /** Checks whether an event comes from inside a chip element. */\n    private _originatesFromChip;\n    /** Checks whether any of the chips is focused. */\n    private _hasFocusedChip;\n    /** Syncs the list's state with the individual chips. */\n    private _syncChipsState;\n    static ngAcceptInputType_multiple: BooleanInput;\n    static ngAcceptInputType_required: BooleanInput;\n    static ngAcceptInputType_disabled: BooleanInput;\n    static ngAcceptInputType_selectable: BooleanInput;\n}\nexport {};\n"]}