import type ImageryTileLayer from "@arcgis/core/layers/ImageryTileLayer";
import type Layer from "@arcgis/core/layers/Layer";
import type PortalItem from "@arcgis/core/portal/PortalItem";
import type { FeatureSettings } from "../data/FeatureSettings.js";
import type { Schema } from "../data/Schema.js";
import type { TiledImageServiceLayerJson } from "../json/TiledImageServiceLayerJson.js";
import type { PropertyDefs } from "../support/Serializable.js";
import type { LayerExtensionProperties, LayerProperties } from "./_LayerExtension.js";
import { LayerExtension } from "./_LayerExtension.js";
/**
 * Properties that can be passed into the constructor for
 * {@link ImageryTileLayerExtension}.
 */
export interface ImageryTileLayerExtensionProperties extends LayerExtensionProperties {
    /**
     * The Esri ImageryTileLayer object being extended.
     */
    layer?: ImageryTileLayer | (TiledImageServiceLayerJson & ImageryTileLayerProperties);
}
/**
 * Properties that can be specified for the
 * {@link ImageryTileLayerExtensionProperties.layer} property.
 */
export type ImageryTileLayerProperties = LayerProperties & {
    /**
     * URL to an offline tile package for this layer. Not supported in the
     * TypeScript API.
     */
    $tilePackageUrl?: string;
};
/**
 * Extends the capabilities of an Esri ImageryTileLayer object.
 */
export declare class ImageryTileLayerExtension extends LayerExtension<ImageryTileLayerExtensionProperties> {
    get layer(): ImageryTileLayer;
    get supportsSublayers(): boolean;
    protected _getSerializableProperties(): PropertyDefs<ImageryTileLayerExtensionProperties>;
    /**
     * @inheritDoc
     */
    protected _isSupportedLayer(layer: Layer): boolean;
    protected _createSchema(): Schema;
    protected _initializeLayer(): Promise<void>;
    protected _onInitialize(): Promise<void>;
    protected _applyPortalItemProperties(portalItem: PortalItem): Promise<void>;
    protected _createFeatureSettings(): FeatureSettings;
}
