List<StoreKey> getSuccessfullyPutChunkIdsIfCompositeDirectUpload() {
    boolean compositeDirectUpload = !isStitchOperation() && isComposite();
    return compositeDirectUpload ? metadataPutChunk.getSuccessfullyPutChunkIds() : Collections.emptyList();
  }
If this is a composite object, fill the list with chunk IDs successfully created by this operation.
This does not include IDs being stitched together by a stitchBlob call.
@return the list of successfully put chunk ids if this is a composite object and not a stitch operation, empty list
        otherwise.
ambry-router/src/main/java/com/github/ambry/router/PutOperation.java