| playable | The Playable used by this operation. |
| inputIndex | The input port index. |
| sourcePlayable | The Playable to connect to. |
| sourceOutputIndex | The output port of the Playable. |
Connect the output port of a Playable to one of the input ports.
This method is a simple helper on top of PlayableGraph.Connect.
NOTE: This is a templated extension method that can be used on any type that inherits from IPlayable.