function readLongDeprecatedDeprecated(will be removed after 1.0.0) Use the Web Streams API instead. import { readLong } from "https://deno.land/std@0.221.0/io/mod.ts"; Deprecated(will be removed after 1.0.0) Use the Web Streams API instead. readLong(buf: BufReader): Promise<number | null>Read big endian 64bit long from BufReader Parametersbuf: BufReaderReturnsPromise<number | null>