import { Nullable } from "@babylonjs/core/types";
import { Material } from "@babylonjs/core/Materials/material";
import { IMaterial } from "../glTFLoaderInterfaces";
import { IGLTFLoaderExtension } from "../glTFLoaderExtension";
import { GLTFLoader } from "../glTFLoader";
/**
 * [Specification](https://github.com/KhronosGroup/glTF/tree/master/extensions/2.0/Khronos/KHR_materials_pbrSpecularGlossiness)
 */
export declare class KHR_materials_pbrSpecularGlossiness implements IGLTFLoaderExtension {
    /** The name of this extension. */
    readonly name = "KHR_materials_pbrSpecularGlossiness";
    /** Defines whether this extension is enabled. */
    enabled: boolean;
    private _loader;
    /** @hidden */
    constructor(loader: GLTFLoader);
    /** @hidden */
    dispose(): void;
    /** @hidden */
    loadMaterialPropertiesAsync(context: string, material: IMaterial, babylonMaterial: Material): Nullable<Promise<void>>;
    private _loadSpecularGlossinessPropertiesAsync;
}