I found how to give a group of class members a name:
/**\{ \name Foo */ members /** \}*/
but how can I refer to Foo from other members of the class?
/** \{ \anchor Foo \name Foo */ members /** \} */
An anchor allows you to reference a group from another location using
/// \ref Foo
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https://fooobar.com/questions/1153445/what-is-benifit-of-making-a-class-abstract