import type { EditorCore, EditorOptions } from 'roosterjs-content-model-types';
/**
 * @internal Create core object for editor
 * @param contentDiv Editor content DIV
 * @param options Editor options
 */
export declare function createEditorCore(contentDiv: HTMLDivElement, options: EditorOptions): EditorCore;
/**
 * @internal Export for test only
 * A fallback function, always return original color
 */
export declare function getDarkColorFallback(color: string): string;