export interface Logger {
    log: (message?: any, ...optionalParams: any[]) => void;
    warn: (message?: any, ...optionalParams: any[]) => void;
    error: (message?: any, ...optionalParams: any[]) => void;
}
export declare let logger: Logger;
export declare function setLogger(value: Logger): void;
export interface LogEntry {
    level: number;
    time: number;
    message: string;
    params: any[];
}
export declare class LogCollector implements Logger {
    static readonly LOG = 10;
    static readonly WARN = 20;
    static readonly ERROR = 30;
    private _logs;
    private _logger;
    constructor(logger?: Logger);
    clear(): void;
    get logs(): LogEntry[];
    exportToStr(level?: number, entries?: number): string;
    log(message?: any, ...params: any[]): void;
    warn(message?: any, ...params: any[]): void;
    error(message?: any, ...params: any[]): void;
    private _push;
}