How to visualize this dependency in a use case diagram

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Lets say a user saves something client side, now the system wants to synchronize it to the database. Do you visualize the dependency like this: (client side operation)< - - - - - (cloud synchronization); or like this: (client side operation) - - - - - >(cloud synchronization);

The client element triggers the synchronization element but the synchronization element is dependent on the client element so i am a little confused what is the best way.

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