docs: private void runInternal(IMarker marker) throws CoreException {
          Assert.isNotNull(marker);
  
         PendingRewrite pending = resolveWithoutWriting(marker);
         if(pending == null){
             return;
         }
  
          try {
              IRegion region = completeRewrite(pending);
              if(region == null){
                  return;
              }
              IEditorPart part = EditorUtility.isOpenInEditor(pending.originalUnit);
              if (part instanceof ITextEditor) {
                  ((ITextEditor) part).selectAndReveal(region.getOffset(), region.getLength());
              }
          } finally {
              pending.originalUnit.discardWorkingCopy();
          }
      }