import { IItem } from '../../types';
/**
 * Determines if the given item is an imagery service.
 *
 * @param item - The item to check, must contain a type property
 * @returns `true` if the item type is 'Image Service', `false` otherwise
 *
 * @remarks
 * This function performs a null/undefined check on the item and its type property
 * before evaluating if the type matches 'Image Service'.
 */
export declare const isImageryService: (item: IItem) => boolean;
/**
 * Check if the given item is an elevation layer.
 * @param item - The item to check.
 * @returns `true` if the item is an elevation layer, `false` otherwise.
 *
 * @remarks
 * This function checks if the item type is 'Image Service' and if it contains
 * the 'esriElevationLayer' keyword in its typeKeywords array.
 */
export declare const isElevation3DLayer: (item: IItem) => boolean;