I have a grid panel in the center region and another component in the east region and i want to forbid this component to expand when the grid is empty i tried the beforeexpand listeners and it doesn't work when i expand the panel from the panel expand tool or the splitter that appears when the split property is true i found a reference to expand tool in the component and can disable the tool but there is still the splitter i can not find a reference to it any ideas how can i get splitter ?