Return a reference providing non-modifiable access to the DatetimeTz value of this object.
DatetimeTz
Declared in <ball_userfieldvalue.h>
<ball_userfieldvalue.h>
bdlt::DatetimeTz const& theDatetimeTz() const;
The behavior is undefined unless type() == ball::UserFieldType::e_DATETIMETZ.
type() == ball::UserFieldType::e_DATETIMETZ
non-modifiable reference to the DatetimeTz value