if (bottomRightSelect.getFirstChild().isNot(Type.SELECT)) break;
bottomRightSelect = bottomRightSelect.getFirstChild();
replaceInSelectNodeReferencesToRemovedSource(context, bottomRightSelect, rewrittenSelectors);
}
topRightSelect.setParent(null);
bottomRightSelect.removeAllChildren();
// Place just above the left source ...
leftSource.getParent().addLastChild(topRightSelect);
leftSource.setParent(bottomRightSelect);
}