import { Frame } from "./stack.js";
export interface Runtime {
    objToStderr(obj: unknown): void;
}
declare const _default: {
    TimestampFieldName: string;
    TimestampFieldFormatter: (time: Date) => string;
    LevelFieldName: string;
    LevelTraceValue: string;
    LevelDebugValue: string;
    LevelInfoValue: string;
    LevelWarnValue: string;
    LevelErrorValue: string;
    LevelFatalValue: string;
    MessageFieldName: string;
    ErrorFieldName: string;
    ErrorFieldFormatter: (err: unknown) => string | undefined;
    CallerFieldName: string;
    StackFieldName: string;
    StackFieldFormatter: (err: unknown) => Frame[] | undefined;
    Runtime: Runtime;
    /** The ParamHook allows us to pass a function in which can populate additional fields into all log messages */
    ParamHook: () => Record<string, string | number | boolean>;
};
export default _default;