/**
 * Simplified from https://github.com/zertosh/invariant.
 */
export declare enum LEVEL {
    ERROR = "error",
    WARN = "warn",
    INFO = "log"
}
/**
 * invariant error
 * @param condition
 * @param format
 * @param args
 */
export declare function invariant(condition: boolean, format: string, ...args: any[]): void;
/**
 * 打印语句
 * @param level
 * @param condition
 * @param format
 * @param args
 */
export declare function log(level: LEVEL, condition: boolean, format: any, ...args: any[]): void;