// Warning: a module must have something besides just a "declare module"
// section; otherwise it is ignored.
export type BinaryPredicate<T> = (a: T, b: T) => T
declare module "./type" {
   interface Signatures<T> {
      equal:   (a: T, b: T) => boolean
      unequal: (a: T, b: T) => boolean
   }
}