code: function (files) {
        UI.widgets.uploadFiles(kb.fetcher, files, subject.uri, subject.uri, function (file, uri) {
          // A file has been uploaded
          let destination = kb.sym(uri)
          console.log(' Upload: put OK: ' + destination)
          kb.add(subject, ns.ldp('contains'), destination, subject.doc())
          mainTable.refresh()
        })
      }
docs: /////////// Allow new file to be Uploaded