Provides functionality for holding related instances.
This class is a standard built-in class in the Rice language.
Instance that is created by declaration is still uninitialized.
Returns an instance with initial value.
Returns an instance that is initialized by any instances.
Returns whether the first instance is set.
Returns whether the second instance is set.
Returns the first instance.
Gets a value that indicates whether it has been initialized.
Returns the second instance.
Returns the class name.
Sets up the first instance.
Sets up the second instance.