docs: @Override
      public int getBatchLimit ( String cmd ) {
          Integer set = this.batchLimits.get(cmd);
          if ( set != null ) {
              return set;
          }
  
          set = doGetBatchLimit(cmd);
          if ( set != null ) {
              this.batchLimits.put(cmd, set);
              return set;
          }
  
          set = DEFAULT_BATCH_LIMITS.get(cmd);
          if ( set != null ) {
              return set;
          }
          return 1;
      }