func (v *Entry) SetPlaceholderText(text string) {
	cstr := C.CString(text)
	defer C.free(unsafe.Pointer(cstr))
	C.gtk_entry_set_placeholder_text(v.native(), (*C.gchar)(cstr))
}
func (v *Entry) SetPlaceholderText(text string) {
	cstr := C.CString(text)
	defer C.free(unsafe.Pointer(cstr))
	C.gtk_entry_set_placeholder_text(v.native(), (*C.gchar)(cstr))
}
// SetPlaceholderText() is a wrapper around gtk_entry_set_placeholder_text().