function readLongDeprecatedDeprecated(will be removed after 1.0.0) Use the Web Streams API instead. import { readLong } from "https://dotland.deno.dev/std@0.215.0/io/mod.ts"; readLong(buf: BufReader): Promise<number | null>Read big endian 64bit long from BufReader Parametersbuf: BufReaderReturnsPromise<number | null>