variablesReference property
If variablesReference is > 0, the new value is structured and its
children can be retrieved by passing variablesReference to the
variables request as long as execution remains suspended. See 'Lifetime
of Object References' in the Overview section for details.
If this property is included in the response, any variablesReference
previously associated with the updated variable, and those of its
children, are no longer valid.
Implementation
final int? variablesReference;