Luke Harris luk707

## optional.ts
// Optional declares a type of keyed type T where all keys are optional.
// This allows
type Optional<T> = { [P in keyof T]? :T[P] }

interface Foo {
  x :number
  y :number
}

type OptionalFoo = Optional<Foo>
	// Optional declares a type of keyed type T where all keys are optional.
	// This allows
	type Optional<T> = { [P in keyof T]? :T[P] }

	interface Foo {
	x :number
	y :number
	}

	type OptionalFoo = Optional<Foo>