This is a specialization of the FormatterCharacter_MakeUnsigned template for the type wchar_t having 4-byte length.
FormatterCharacter_MakeUnsigned
wchar_t
Declared in <bslfmt_formattercharacter.h>
<bslfmt_formattercharacter.h>
template<> struct FormatterCharacter_MakeUnsigned<wchar_t, 4>;
type