Same as the str overload taking const StringType&.
str
const StringType&
Declared in <bslstl_stringbuf.h>
<bslstl_stringbuf.h>
template<class SALLOC> void str(basic_string<CHAR_TYPE, CHAR_TRAITS, SALLOC> const& value) requires !bsl::is_same<ALLOCATOR, SALLOC>::value;