export declare enum LogLevel {
    DeepTrace = -3,
    Trace = -2,
    Debug = -1,
    Info = 0,
    Warn = 1,
    Error = 2,
    None = 100000,
}
/**
 * Basic logging abstraction supporting
 * different log levels.
 */
export declare class Logger {
    level: LogLevel;
    constructor(level: LogLevel);
    /**
     * Logs a string internally. It should only be called
     * once through an internal method to display the
     * caller that originally logged the string.
     *
     * @param prefix - An appended prefix
     * @param msg - The message including placeholders ({} or {:?})
     * @param insertions - The items that replace their respective placeholders
     * @param msgLevel - The log level of the message
     */
    private log(prefix, msg, insertions, msgLevel);
    private substringStartsWith(substrStartIndex, str, matched);
    uses(level: LogLevel): boolean;
    deepTrace(msg: string, ...insertions: any[]): void;
    trace(msg: string, ...insertions: any[]): void;
    debug(msg: string, ...insertions: any[]): void;
    info(msg: string, ...insertions: any[]): void;
    warn(msg: string, ...insertions: any[]): void;
    error(msg: string, ...insertions: any[]): void;
}
export declare const LOG: Logger;