question: private void clearSBgDataStructures ( ) { synchronized ( sBgLock ) { sBgWorkspaceItems . clear ( ) ; sBgAppWidgets . clear ( ) ; sBgFolders . clear ( ) ; sBgItemsIdMap . clear ( ) ; sBgDbIconCache . clear ( ) ; sBgWorkspaceScreens . clear ( ) ; } }
target:  Clears all the sBg data structures 