gcut-value-equal
gboolean gcut_value_equal (const GValue *value1, const GValue *value2); void gcut_value_register_equal_func (GType type1, GType type2, GEqualFunc equal_func);
gboolean gcut_value_equal (const GValue *value1, const GValue *value2);
1.0.5から
void gcut_value_register_equal_func (GType type1, GType type2, GEqualFunc equal_func);