import { EventEmitter, InjectOptions, OnChanges, OnDestroy, OnInit, SimpleChanges } from '@angular/core';
import { Collection } from 'ol';
import { ObjectEvent } from 'ol/Object';
import { Extent } from 'ol/extent';
import BaseEvent from 'ol/events/Event';
import BaseLayer from 'ol/layer/Base';
import LayerGroup, { Options } from 'ol/layer/Group';
import { NolPrefixedOptions, NolSafeAny } from 'ngx-ol-library/core';
import * as i0 from "@angular/core";
/**
 * A [Collection](https://openlayers.org/en/latest/apidoc/module-ol_Collection-Collection.html) of layers that are handled together.
 * @name nol-layer-group
 * @order 1
 */
export declare class NolLayerGroupComponent implements NolPrefixedOptions<Options>, OnInit, OnChanges, OnDestroy {
    nolOpacity?: number;
    nolVisible?: boolean;
    nolExtent?: Extent;
    nolZIndex?: number;
    nolMinResolution?: number;
    nolMaxResolution?: number;
    nolMinZoom?: number;
    nolMaxZoom?: number;
    nolLayers?: BaseLayer[] | Collection<BaseLayer>;
    nolProperties?: Record<string, NolSafeAny>;
    nolChange: EventEmitter<BaseEvent>;
    nolExtentChange: EventEmitter<Extent>;
    nolLayersChange: EventEmitter<BaseLayer[]>;
    nolMaxResolutionChange: EventEmitter<number>;
    nolMaxZoomChange: EventEmitter<number>;
    nolMinResolutionChange: EventEmitter<number>;
    nolMinZoomChange: EventEmitter<number>;
    nolOpacityChange: EventEmitter<number>;
    nolVisibleChange: EventEmitter<boolean>;
    nolZIndexChange: EventEmitter<number>;
    nolError: EventEmitter<BaseEvent>;
    nolPropertychange: EventEmitter<ObjectEvent>;
    private readonly cdr;
    private readonly destroyRef;
    private readonly host;
    private instance;
    getInstance(): LayerGroup;
    ngOnInit(): void;
    ngOnChanges(changes: SimpleChanges): void;
    ngOnDestroy(): void;
    static ɵfac: i0.ɵɵFactoryDeclaration<NolLayerGroupComponent, never>;
    static ɵcmp: i0.ɵɵComponentDeclaration<NolLayerGroupComponent, "nol-layer-group", never, { "nolOpacity": { "alias": "nolOpacity"; "required": false; }; "nolVisible": { "alias": "nolVisible"; "required": false; }; "nolExtent": { "alias": "nolExtent"; "required": false; }; "nolZIndex": { "alias": "nolZIndex"; "required": false; }; "nolMinResolution": { "alias": "nolMinResolution"; "required": false; }; "nolMaxResolution": { "alias": "nolMaxResolution"; "required": false; }; "nolMinZoom": { "alias": "nolMinZoom"; "required": false; }; "nolMaxZoom": { "alias": "nolMaxZoom"; "required": false; }; "nolLayers": { "alias": "nolLayers"; "required": false; }; "nolProperties": { "alias": "nolProperties"; "required": false; }; }, { "nolChange": "nolChange"; "nolExtentChange": "nolExtentChange"; "nolLayersChange": "nolLayersChange"; "nolMaxResolutionChange": "nolMaxResolutionChange"; "nolMaxZoomChange": "nolMaxZoomChange"; "nolMinResolutionChange": "nolMinResolutionChange"; "nolMinZoomChange": "nolMinZoomChange"; "nolOpacityChange": "nolOpacityChange"; "nolVisibleChange": "nolVisibleChange"; "nolZIndexChange": "nolZIndexChange"; "nolError": "nolError"; "nolPropertychange": "nolPropertychange"; }, never, ["*"], true, never>;
}
export declare function injectLayerGroup(): NolLayerGroupComponent;
export declare function injectLayerGroup(options: InjectOptions & {
    optional?: false;
}): NolLayerGroupComponent;
export declare function injectLayerGroup(options: InjectOptions): NolLayerGroupComponent | null;