method Headers.prototype.keysimport { Headers } from "https://deno.land/x/netzo@v0.1.10/deno.d.ts"; keys(): IterableIterator<string>Returns an iterator allowing to go through all keys contained in this Headers object. The keys are ByteString objects. Returns an iterator allowing to go through all keys contained in this Headers object. The keys are ByteString objects. ReturnsIterableIterator<string>