# finally

Invokes a specified action after the source observable sequence terminates gracefully or exceptionally.

## Arguments

1. `predicate` *(`Function`)*: A function to test each source element for a condition;  The callback is called with the following information:
   1. the value of the element
   2. the index of the element
   3. the Observable object being subscribed
2. `[thisArg]` *(`Any`)*: Object to use as `this` when executing the predicate.

## Returns

*(`Observable`)*: An observable sequence that contains elements from the input sequence that satisfy the condition.

## Example