Assign to this object the value of the specified rhs, and return a reference providing modifiable access to this object. The contents of rhs are either move-inserted into or move-assigned to this object. rhs is left in a valid but unspecified state.
Declared in <bdlb_nullablevalue.h>
NullableValue<TYPE>&
operator=(bslmf::MovableRef<NullableValue> rhs);