A singleton used to indicate that a `late` `Member` of a particular instance has not been initialized.

For example, given

    class Example() {
        shared late Example parent;
    }

Then

    value ex = Example();// uninitialized parent
    value context = serialization();
    value refs = context.references(ex);
    assert(is Member parentRef = refs.find((element) => element is Member));
    assert(parentRef.referred(ex) == uninitializedLateValue);

Thus, if a serialization library supports it, it is possible to serialize uninitialized `late` values.

- `Anything`
  - `Object`
    - `Basic` ...and other supertypes
      - `UninitializedLateValue`
        - `uninitializedLateValue`

- `uninitializedLateValue`
  - `UninitializedLateValue`
    - `Basic`
      - `Identifiable`
      - `Object`
        - `Anything`

no subtypes hierarchy

Inherited Attributes
Attributes inherited from: `Object` `hash`, `string`

Inherited Methods
Methods inherited from: `Object` `equals()`