| playable | The Playable used by this operation. |
| inputPort | The port index. |
Playable Playable connected at the index specified, or null if the index is valid but is not connected to anything. This happens if there was once a Playable connected at the index, but was disconnected via PlayableGraph.Disconnect.
Returns the Playable connected at the given input port index.
NOTE: This is a templated extension method that can be used on any type that inherits from IPlayable