Variable observableBaseShape`Const`

observableBaseShape: ShapeDefinition<
    {
        value: ShapeUnknown<[unknown]>;
        destroy(): void;
        listen(
            fireImmediately: boolean,
            callback: AnyFunction,
        ): RemoveListenerCallback;
        removeListener(listener: AnyFunction): boolean;
    },
    false,
> = ...

The base shape for an observable. Useful for determining if any object is an observable without using inheritance checks.