code: public void traceMutations(Logger logger) {
          logger.debug("Transaction in " + getTenant().getName() + ": " + getMutationsCount() + " mutations");
          for(ColumnUpdate mutation: getColumnUpdates()) {
              logger.trace(mutation.toString());
          }
          //2. delete columns
          for(ColumnDelete mutation: getColumnDeletes()) {
              logger.trace(mutation.toString());
          }
          //3. delete rows
          for(RowDelete mutation: getRowDeletes()) {
              logger.trace(mutation.toString());
          }
      }
docs: For extreme logging.
  
  @param logger  Logger to trace mutations to.