DatumMapRef is trivially copyable.
DatumMapRef
Declared in <bdld_datum.h>
<bdld_datum.h>
operator BloombergLP::bslmf::NestedTraitDeclaration<DatumMapRef, HasPrintMethod>() const;
nested trait declaration for bsl::is_trivially_copyable
bsl::is_trivially_copyable