/**
 * Returns f such that f() calls func(...boundArgs), i.e. optimizes `() => func(...boundArgs)`.
 * It is faster on node6 by 57-92%.
 */
export declare function bindB<R>(func: (...args: any[]) => R, b: any[]): () => R;
/**
 * Returns f such that f(unboundArg) calls func(unboundArg, ...boundArgs).
 * I.e. optimizes `(arg) => func(arg, ...boundArgs)`.
 * It is faster on node6 by 0-92%.
 */
export declare function bindUB<U, R>(func: (arg: U, ...args: any[]) => R, b: any[]): (arg: U) => R;
/**
 * Returns f such that f(unboundArg) calls func(...boundArgs, unboundArg).
 * I.e. optimizes `(arg) => func(...boundArgs, arg)`.
 * It is faster on node6 by 0-92%.
 */
export declare function bindBU<R>(func: (...args: any[]) => R, b: any[]): (arg: any) => R;