I would like to be able to customize the collapse action on a splitter pane. The specific use case is to be able to collapse a splitter to a minimum width, and when it is at the minimum width the collapse icon switches to expand. I have been able to create a workaround by intercepting the state change and setting a pane to a minimum width when the collapsed property changes. It requires some complex state checking code, and there is no way to switch the icon. There are a number of ways that this could be accomplished by exposing more props to give developers more flexibility with the collapse icon click. Thanks.