code: protected Boolean getCanDownload() {
          return mBodyMap.containsKey(BoxItem.FIELD_SHARED_LINK) ?
                  ((BoxSharedLink) mBodyMap.get(BoxItem.FIELD_SHARED_LINK)).getPermissions().getCanDownload() :
                  null;
      }
docs: Returns the value for whether the shared link allows downloads currently set in the request.
  
  @return  Boolean for whether the shared link allows downloads, or null if not set.