Method start

csv/stringify_stream.ts:106–121

(controller)

    super(
      {
        start(controller) {
          if (columns && columns.length > 0) {
            try {
              controller.enqueue(
                stringify(
                  [columns],
                  separator !== undefined
                    ? { separator, headers: false }
                    : { headers: false },
                ),
              );
            } catch (error) {
              controller.error(error);
            }
          }
        },
        transform(chunk, controller) {
          try {
            controller.enqueue(