static ConstantKey get_constant_key(Id, const Variant &value);
Id get_constant_id(Id, const Variant &value);
Id get_vector_constant_id(Id, unsigned, Id);
static ConstantKey get_constant_key(Id, const Variant &value);
Id get_constant_id(Id, const Variant &value);
Id get_vector_constant_id(Id, unsigned, Id);