docs: public boolean isEmpty() {
  
          if (isFull || isFullSelect || isFullInsert || isFullUpdate
                  || isFullReferences || isFullDelete) {
              return false;
          }
  
          if (selectColumnSet != null && !selectColumnSet.isEmpty()) {
              return false;
          }
  
          if (insertColumnSet != null && !insertColumnSet.isEmpty()) {
              return false;
          }
  
          if (updateColumnSet != null && !updateColumnSet.isEmpty()) {
              return false;
          }
  
          if (referencesColumnSet != null && !referencesColumnSet.isEmpty()) {
              return false;
          }
  
          if (triggerColumnSet != null && !triggerColumnSet.isEmpty()) {
              return false;
          }
  
          return true;
      }