func (v *SelectionData) GetData() (data []byte) {
	var length C.gint
	c := C.gtk_selection_data_get_data_with_length(v.native(), &length)
	sliceHeader := (*reflect.SliceHeader)(unsafe.Pointer(&data))
	sliceHeader.Data = uintptr(unsafe.Pointer(c))
	sliceHeader.Len = int(length)
	sliceHeader.Cap = int(length)
	return
}
func (v *SelectionData) GetData() (data []byte) {
	var length C.gint
	c := C.gtk_selection_data_get_data_with_length(v.native(), &length)
	sliceHeader := (*reflect.SliceHeader)(unsafe.Pointer(&data))
	sliceHeader.Data = uintptr(unsafe.Pointer(c))
	sliceHeader.Len = int(length)
	sliceHeader.Cap = int(length)
	return
}
// GetData is a wrapper around gtk_selection_data_get_data_with_length.
// It returns a slice of the correct size with the selection's data.