code: func (v *ScrolledWindow) SetPolicy(hScrollbarPolicy, vScrollbarPolicy PolicyType) {
  	C.gtk_scrolled_window_set_policy(v.native(),
  		C.GtkPolicyType(hScrollbarPolicy),
  		C.GtkPolicyType(vScrollbarPolicy))
  }
docs: // SetPolicy() is a wrapper around gtk_scrolled_window_set_policy().