code: function(id) {
              var uploadDataEntry = this.getUploads({id: id}),
                  parentId = null;
  
              if (uploadDataEntry) {
                  if (uploadDataEntry.parentId !== undefined) {
                      parentId = uploadDataEntry.parentId;
                  }
              }
  
              return parentId;
          }
docs: Parent ID for a specific file, or null if this is the parent, or if it has no parent.