docs: private void prepareInitialState(boolean isNewObject)
      {
          // determine appropriate modification state
          ModificationState initialState;
          if(isNewObject)
          {
              // if object is not already persistent it must be marked as new
              // it must be marked as dirty because it must be stored even if it will not modified during tx
              initialState = StateNewDirty.getInstance();
          }
          else if(isDeleted(oid))
          {
              // if object is already persistent it will be marked as old.
              // it is marked as dirty as it has been deleted during tx and now it is inserted again,
              // possibly with new field values.
              initialState = StateOldDirty.getInstance();
          }
          else
          {
              // if object is already persistent it will be marked as old.
              // it is marked as clean as it has not been modified during tx already
              initialState = StateOldClean.getInstance();
          }
          // remember it:
          modificationState = initialState;
      }