interface CsvStringifyStreamOptionsimport { type CsvStringifyStreamOptions } from "https://deno.land/std@0.203.0/csv/mod.ts"; 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.