Best way to find "directly" inherited types?

[dand-oss]

Lets say we need the "tree" of inheritance
to display in a gui
or generate wrappers (non cpp) mirroring a class hierarchy

get_base_classes() returns ALL classes, as does get_derived_classes()
is_base_of() and is_derived_from() both consider ALL types inherited

What it the best way to find the types "directly" inherited using the RTTR public API?

Ex
struct a {} ;
struct b : a {};
struct c {} ;

struct d : c, b {};

We want to return range of types
"c, b"
for stuct d rather than
"a, b, c"
as get_base_classes() provides

[acki-m]

Sorry, but at the moment there is no such function to get this information.
I have to provide such function similar to this like get_properties(filter_item)

[dand-oss]

PR #237 - add rttr:type::get_direct_base_classes()