How to make Rad69 request without using DicomObjects

In XdsObjects, we have made a new method for retrieving Imaging Document sets without the dependency to DicomObjects.

XDS-I

XDS for Imaging (XDS-I) is an extension to the IHE XDS protocol explicitly for imaging, which stores a DICOM Key Image Note (aka Key Object Selection Document) as the stored object in the Document Repository which in turn lines to the images in the “Image Source” (normally the original PACS, or perhaps a regional equivalent).