import { ITheme } from '../common/Theme';
/**
 * Function to override a target theme.
 * Properties provided will be merged against the target theme.
 * @param customTheme Custom Theme properties to override
 * @param overrideTarget Target Theme to override against
 */
export declare const OverrideTheme: <T extends ITheme>(customTheme: T, overrideTarget?: ITheme) => ITheme;