Stub class for backwards compatibility.
Since PHP 7 adds "object" as a reserved keyword, we can no longer have a class named that and retain PHP 7 compatibility. The original class has been renamed to "Instance", and this class is now an extension of it. It raises an E_USER_DEPRECATED to warn users to migrate.
||if a 'value' key is missing, or its value is not a string|
getObject() : null | string
$value : string