B. Full class hierarchy visible to Lua-side

    Obj
     |-->WHook
     |-->WTimer
     |-->WMoveresMode
     |-->WRegion
     |    |-->WClientWin
     |    |-->WWindow
     |    |    |-->WRootWin
     |    |    |-->WMPlex
     |    |    |    |-->WFrame
     |    |    |    `-->WScreen
     |    |    |-->WInfoWin
     |    |    |    `-->WStatusBar (mod_statusbar)
     |    |    |-->WMenu (mod_menu)
     |    |    `-->WInput (mod_query)
     |    |         |-->WEdln (mod_query)
     |    |         `-->WMessage (mod_query)
     |    |-->WGroup
     |    |    |-->WGroupWS
     |    |    `-->WGroupCW
     |    `-->WTiling (mod_tiling)
     `-->WSplit (mod_tiling)
          |-->WSplitInner (mod_tiling)
          |    `-->WSplitSplit (mod_tiling)
          |         `-->WSplitFloat (mod_tiling)
          `-->WSplitRegion (mod_tiling)
               `-->WSplitST (mod_tiling)