code: function buildLockedQueryBody(lockedParams) {
      const queryBody = [];
      Object.keys(lockedParams).forEach((key) => {
          const query = {};
          let queryKey = [`${key}`];
          if (key === 'tags') {
              queryKey = key;
          } else if (key === 'contributors') {
              queryKey = 'lists.contributors.name';
          }
          query[queryKey] = lockedParams[key];
          if (key === 'bool') {
              queryBody.push(query);
          } else {
              queryBody.push({
                  terms: query,
              });
          }
      });
      return queryBody;
  }
docs: For services where portion of query is restricted.
  Builds the locked portion of the query.
  For example, in preprints, types=['preprint', 'thesis']
  is something that cannot be modified by the user.
  
  @method buildLockedQueryBody
  @param {Object} lockedParams - Locked param keys matched to the locked value.
  @return {List} queryBody - locked portion of query body