code: @WithBridgeMethods(value = MySQLQuery.class, castRequired = true)
      public C forceIndex(String... indexes) {
          return addJoinFlag(" force index (" + JOINER.join(indexes) + ")", JoinFlag.Position.END);
      }
docs: You can use FORCE INDEX, which acts like USE INDEX (index_list) but with the addition that a
  table scan is assumed to be very expensive. In other words, a table scan is used only if there
  is no way to use one of the given indexes to find rows in the table.
  
  @param indexes index names
  @return the current object