Headers

new Headers(init?: HeadersInit)

append(name: string, value: string): void

delete(name: string): void

entries(): IterableIterator<[string, string]>

forEach(callbackfn: (value: string, key: string, parent: Headers) => void, thisArg?: any): void

get(name: string): string | null

getSetCookie(): Array<string>

has(name: string): boolean

keys(): IterableIterator<string>

set(name: string, value: string): void

values(): IterableIterator<string>