interface CsvStringifyStreamOptionsimport { type CsvStringifyStreamOptions } from "https://dotland.deno.dev/std@0.221.0/csv/csv_stringify_stream.ts"; Options for CsvStringifyStream. Propertiesreadonlyoptionalseparator: string = ","Delimiter used to separate values. readonlyoptionalcolumns: Array<string>A list of columns to be included in the output. If you want to stream objects, this option is required.