DatumMapOwningKeysBuilder is allocator-aware.
DatumMapOwningKeysBuilder
Declared in <bdld_datummapowningkeysbuilder.h>
<bdld_datummapowningkeysbuilder.h>
operator BloombergLP::bslmf::NestedTraitDeclaration<DatumMapOwningKeysBuilder, UsesBslmaAllocator>() const;