From iPhone Development Wiki

Root class used in SBFolders (SBRootFolder, SBRootFolderWithDock, SBFloatyFolder, et al.)

void -[SBFolderView layoutIconLists:(id)lists animationType:(int)type forceRelayout:(BOOL)force]

This method iterates through SBIconListViews within the SBFolderView and calls `layoutIconsIfNeeded:animationType:options:` on each instance.

If `forceRelayout` is True, then `setIconsNeedLayout` will be called on the list beforehand, forcing it to re-layout regardless of the existing state.