/**
 *
 * t: current time（当前时间）
 * b: beginning value（初始值）
 * c: change in value（变化量）
 * d: duration（持续时间）。
 *
 *
 */
declare const Linear: (t: any, b: any, c: any, d: any) => any;
declare const easeIn: (t: any, b: any, c: any, d: any) => any;
declare const easeOut: (t: any, b: any, c: any, d: any) => any;
export { Linear, easeIn, easeOut };