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# Assume Existence

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If you configure a class's descriptor with an existence checking policy of assume existence, TopLink will assume that all instances of that class registered with a unit of work exist and TopLink will always perform an update operation to the database on all such registered objects; even new objects that you registered with `registerObject` method. However, if you use the `registerNewObject` method on the new object, TopLink knows to perform an insert operation in the database even though the existence checking policy says assume existence.