glib/gvariant.go
func (v *Variant) IsType(t *VariantType) bool {
	return gobool(C.g_variant_is_of_type(v.native(), t.native()))
}
func (v *Variant) IsType(t *VariantType) bool {
	return gobool(C.g_variant_is_of_type(v.native(), t.native()))
}
// IsType returns true if the variant's type matches t.