content = new StringContent(10);
content.insertString(0, "0123456789");
undoable = content.remove(3, 5);
Position pos1 = content.createPosition(3);
assertEquals(3, pos1.getOffset());
undoable.undo();
content = new StringContent(10);
content.insertString(0, "0123456789");
undoable = content.remove(3, 5);
Position pos = content.createPosition(3);
assertEquals(3, pos.getOffset());