method TextProtoReader.prototype.readLineimport { TextProtoReader } from "https://dotland.deno.dev/std@0.146.0/textproto/mod.ts"; readLine(): Promise<string | null>readLine() reads a single line from the TextProtoReader, eliding the final \n or \r\n from the returned string. readLine() reads a single line from the TextProtoReader, eliding the final \n or \r\n from the returned string. ReturnsPromise<string | null>