import { ElementWithExtras, UpdatableProp } from '../types';
export declare const defaultParameterSeparator = "_";
/**
 * Set global parameter separator string
 * Also change type `ParameterSeparator` declaration
 * @default "_"
 * @example "click_e_once"
 */
export declare const setParameterSeparator: (s: string) => string;
export declare const getParameterSeparator: () => string;
export declare const initProp: (element: ElementWithExtras, key: string, value: any) => UpdatableProp | undefined;