• properly deselect items which are not displayed in a sub hierarchy level
  • FIX mikepenz/MaterialDrawer#2184
• refactor the collapse logic and properly support indefinite sub levels of items
  • FIX #630
• add additional method to allow recursively iterating starting at a specific global position
• simplify logic for sample
• fix potential issue of the wrong position being used for the recursive logic in a ModelAdapter
• collapse the expandable items in the FastAdapterDiffUtil if possible (if the extension is available)
  • FIX #628
• fix don't warn definition for the FastAdapterDiffUtil
• increase type safety and convenience of getExtension
  • THANKS @F43nd1r