extern void dofloat(Arg *arg);
extern void dotile(Arg *arg);
extern void focusnext(Arg *arg);
extern void focusprev(Arg *arg);
extern Bool isvisible(Client *c);
extern void dofloat(Arg *arg);
extern void dotile(Arg *arg);
extern void focusnext(Arg *arg);
extern void focusprev(Arg *arg);
extern Bool isvisible(Client *c);