code: public Integer getFirstPosition(String key) {
          int position = -1;
          String processedKey = processKey(key);
  
          if (this.values.containsKey(processedKey) == true) {
              position = this.order.indexOf(processedKey);
          }
          return position;
      }
docs: Returns position of specified key
  
  @param key Key
  @return this instance of QueryParameters