| sourceStateMachine | The source state machine. |
| destinationStateMachine | The destination state machine. |
| destinationState | The destination state. |
AnimatorTransition The AnimatorTransition transition that was created.
Utility function to add an outgoing transition from the source state machine to the destination.
The transition asset that is created is added as a sub asset of the state.
An example showing usage of this API can be found at the AnimatorController page.