import type Layer from "@arcgis/core/layers/Layer";
import type VectorTileLayer from "@arcgis/core/layers/VectorTileLayer";
import type PortalItem from "@arcgis/core/portal/PortalItem";
import type { Schema } from "../data/Schema.js";
import type { VectorTileLayerJson } from "../json/VectorTileLayerJson.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 mapping/VectorTileLayerExtension!VectorTileLayerExtension}.
 */
export interface VectorTileLayerExtensionProperties extends LayerExtensionProperties {
    /**
     * The Esri VectorTileLayer object being extended.
     */
    layer?: VectorTileLayer | (VectorTileLayerJson & LayerProperties);
}
/**
 * Extends the capabilities of an Esri
 * {@link json/VectorTileLayerJson!VectorTileLayerJson} object.
 */
export declare class VectorTileLayerExtension extends LayerExtension<VectorTileLayerExtensionProperties> {
    get layer(): VectorTileLayer;
    protected _getSerializableProperties(): PropertyDefs<VectorTileLayerExtensionProperties>;
    /**
     * @inheritDoc
     */
    protected _isSupportedLayer(layer: Layer): boolean;
    protected _createSchema(): Schema;
    protected _initializeLayer(): Promise<void>;
    protected _onInitialize(): Promise<void>;
    protected _applyPortalItemProperties(portalItem: PortalItem): Promise<void>;
}
