Function assertWritableStream

out/cli.cjs:12098–12102

(x5, context)

        return (chunk, controller) => promiseCall(fn, original, [chunk, controller]);
      }
      function assertWritableStream(x5, context) {
        if (!IsWritableStream(x5)) {
          throw new TypeError(`${context} is not a WritableStream.`);
        }
      }
      function isAbortSignal(value) {
        if (typeof value !== "object" || value === null) {
          return false;