import type Layer from "@arcgis/core/layers/Layer";
import type WebTileLayer from "@arcgis/core/layers/WebTileLayer";
import type { Schema } from "../data/Schema.js";
import type { WebTileLayerJson } from "../json/WebTileLayerJson.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 WebTileLayerExtension}.
 */
export interface WebTileLayerExtensionProperties extends LayerExtensionProperties {
    /**
     * The Esri WebTileLayer object being extended.
     */
    layer?: WebTileLayer | (WebTileLayerJson & LayerProperties);
}
/**
 * Extends the capabilities of an Esri WebTileLayer object.
 */
export declare class WebTileLayerExtension extends LayerExtension<WebTileLayerExtensionProperties> {
    get layer(): WebTileLayer;
    protected _getSerializableProperties(): PropertyDefs<WebTileLayerExtensionProperties>;
    /**
     * @inheritDoc
     */
    protected _isSupportedLayer(layer: Layer): boolean;
    protected _createSchema(): Schema;
}
