code: function updateJobProperty(
              uuid,
              prop,
              val,
              meta,
              callback)
          {
  
              if (typeof (meta) === 'function') {
                  callback = meta;
                  meta = {};
              }
  
              if (!jobs[uuid]) {
                  return callback(new e.BackendResourceNotFoundError(sprintf(
                    'Job with uuid \'%s\' does not exist', uuid)));
              } else {
                  jobs[uuid][prop] = val;
                  return callback(null);
              }
          }
docs: Update only the given Job property. Intendeed to prevent conflicts with two sources updating the same job at the same time, but different properties: - uuid - the job's uuid - prop - the name of the property to update - val - value to assign to such property - meta - Any additional information to pass to the backend which is not job properties - callback - f(err) called with error if something fails, otherwise with null.