Assign to this object the JsonNull singleton value by move.
Assign to this object the singleton value of type JsonNull, and return a reference providing modifiable access to this object. rhs is left in a valid but unspecified state. The value currently held by this object (if any) is destroyed if that value's type is not JsonNull.
a reference providing modifiable access to this object
| Name | Description |
|---|---|
| rhs | null value |