function readLongDeprecatedDeprecatedThis will be removed in 1.0.0. Use the Web Streams API instead. import { readLong } from "https://dotland.deno.dev/std@0.224.0/io/read_long.ts"; readLong(buf: BufReader): Promise<number | null>Read big endian 64bit long from BufReader Parametersbuf: BufReaderReturnsPromise<number | null>