|playable||The Playable used by this operation.|
|outputPort||The port index.|
Playable Playable connected at the output 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 output port index.
NOTE: This is a templated extension method that can be used on any type that inherits from IPlayable