import * as THREE from 'three';
import { BaseExtension } from './base';
import type { Parser } from '../parser';
import { MeshPrimitive } from '../glTF';
/**
 * Specification: https://github.com/KhronosGroup/glTF/tree/master/extensions/2.0/Khronos/KHR_materials_clearcoat
 */
export declare class KHR_materials_clearcoat extends BaseExtension {
    extendMaterial(material: THREE.Material, primitiveDef: MeshPrimitive, parser: Parser): Promise<void>;
}