docs: public DBInstance withDBParameterGroups(DBParameterGroupStatus... dBParameterGroups) {
          if (this.dBParameterGroups == null) {
              setDBParameterGroups(new java.util.ArrayList<DBParameterGroupStatus>(dBParameterGroups.length));
          }
          for (DBParameterGroupStatus ele : dBParameterGroups) {
              this.dBParameterGroups.add(ele);
          }
          return this;
      }