tap_on_complete
Returns an Observable that resembles the source Observable, but modifies it so that the provided Observer is called to perform a side effect on complete event emission by the source.
This operator is useful for debugging your Observables, verifying correctness, or performing other side effects.
Note: this operator differs from a subscribe on the Observable. If the Observable returned by tap_on_complete is not subscribed, the side effects specified by the Observer will never happen. tap_on_complete therefore simply spies on future execution, it does not trigger an execution to happen like subscribe does.
[Operators](@ref what_are_operators)