docs: public long getFileBytesMaxUploadSize(CmsObject cms) {
  
          int maxFileSize = getFileMaxUploadSize();
          long maxFileSizeBytes = maxFileSize * 1024;
          // check if current user belongs to Admin group, if so no file upload limit
          if ((maxFileSize <= 0) || OpenCms.getRoleManager().hasRole(cms, CmsRole.VFS_MANAGER)) {
              maxFileSizeBytes = -1;
          }
          return maxFileSizeBytes;
      }