Replace `TreeAdapter` with a more general, easier to use `nest` operator. * Example usage: `PowerAdapter.nest(position -> newAdapter(position))` * Eliminate `setExpanded()` in favor of handling expansion using conditionals * Deprecate `TreeAdapter`
Replace
TreeAdapterwith a more general, easier to usenestoperator.PowerAdapter.nest(position -> newAdapter(position))setExpanded()in favor of handling expansion using conditionalsTreeAdapter