export declare type FilterTypeBy<T, Condition> = {
    [k in keyof T]: T[k] extends Condition ? k : never;
};
export declare type FilterMemberNames<T, Condition> = FilterTypeBy<T, Condition>[keyof T];
export declare type SubType<T, Condition> = Pick<T, FilterMemberNames<T, Condition>>;
export declare type Methods<T> = SubType<T, Function>;
export declare type Func<A> = (...args: any[]) => A;
export declare type AsyncAction = Func<Promise<any>>;
export declare type AsyncMethods<T> = SubType<T, AsyncAction>;
export declare function compose<A>(...funcs: Func<A>[]): Func<A>;
export declare function mixin<T, A>(instance: T, mixer: (A: any) => A, ...keys: FilterMemberNames<T, Func<A>>[]): T;