/**
 * Bitmasks for each log level.
 *
 * @category Log Level
 */
export declare enum Levels {
    /**
     * Empty bitmask to disable all levels.
     *
     * `&` BITWISE AND 	- 	Disable all levels.
     *
     * `|` BITWISE OR 	- 	No effect.
     */
    NONE = 0,
    /**
     * Bitmask for Error log level.
     *
     * `&` BITWISE AND	- 	Disable all levels except error.
     *
     * `|` BITWISE OR	-	Enable error level without changing other
     * 						active levels.
     */
    ERROR = 1,
    /**
     * Bitmask for Warn log level.
     *
     * `&` BITWISE AND 	- 	Disable all levels except warn.
     *
     * `|` BITWISE OR 	-	Enable warn level without changing other
     * 						active levels.
     */
    WARN = 2,
    /**
     * Bitmask for Info log level.
     *
     * `&` BITWISE AND 	- 	Disable all levels except info.
     *
     * `|` BITWISE OR 	-	Enable info level without changing other
     * 						active levels.
     */
    INFO = 4,
    /**
     * Bitmask for Debug log level.
     *
     * `&` BITWISE AND 	- 	Disable all levels except debug.
     *
     * `|` BITWISE OR 	-	Enable debug level without changing other
     * 						active levels.
     */
    DEBUG = 8,
    /**
     * Bitmask for Trace log level.
     *
     * `&` BITWISE AND 	- 	Disable all levels except trace.
     *
     * `|` BITWISE OR 	-	Enable trace level without changing other
     * 						active levels.
     */
    TRACE = 16,
    /**
     * Bitmask for all built-in log levels.
     *
     * `&` BITWISE AND 	- 	Enable all built-in log levels and disable
     * 					all custom log levels.
     *
     * `|` BITWISE OR 	-	Enable all built-in log levels without
     * 						affecting custom log levels.
     */
    ALL = 255,
    /**
     * Bitmask for all custom log levels.
     *
     * `&` BITWISE AND 	- 	Enable all custom levels and disable
     * 						all built-in log levels.
     *
     * `|` BITWISE OR 	-	Enable all custom log levels without affecting
     * 						built-in log levels.
     */
    ALL_CUSTOM = 9007199254740736,
    /**
     * Bitmask for all log levels.
     *
     * `&` BITWISE AND 	- 	Enable all built-in and all custom log levels.
     *
     * `|` BITWISE OR 	-	Enable all built-in and all custom log levels.
     */
    ALL_EXTENDED = 9007199254740991
}