code: function getValueQuery(tagInfo) {
          var query;
          if (tagInfo.token.string === "=") {
              return "";
          }
          // Remove quotation marks in query.
          query = tagInfo.token.string.substr(1, tagInfo.offset - 1);
  
          // Get the last option to use as a query to support multiple options.
          return query.split(/\s+/).slice(-1)[0];
      }
docs: Return the query text of a value.
  
  @param {!{token: Object, tokenType: number, offset: number, exclusionList: Array.<string>, tagName: string, attrName: string, shouldReplace: boolean}}
  @return {string}  The query to use to matching hints.