static AggregatedMultipart of(Iterable<? extends AggregatedBodyPart> bodyParts) {
        requireNonNull(bodyParts, "bodyParts");
        return of(randomBoundary(), bodyParts);
    }
Returns a new {@link AggregatedMultipart} with the default boundary.

@param bodyParts the body part of the multipart message
core/src/main/java/com/linecorp/armeria/common/multipart/AggregatedMultipart.java