+### ###
+# Provides: ###
+# def focus_next_stacked(data, forward=1): ###
+# """Focus the next (or previous, with forward=0) window in a stacked ###
+# order.""" ###
+# def focus_prev_stacked(data): ###
+# """Focus the previous window in a stacked order.""" ###
+# def focus_next(data, num=1, forward=1): ###
+# """Focus the next (or previous, with forward=0) window in a linear ###
+# order.""" ###
+# def focus_prev(data, num=1): ###
+# """Focus the previous window in a linear order.""" ###
+### ###
+# All of these functions call be used as callbacks for bindings ###
+# directly. ###
+### ###