| playable | The Playable used by this operation. |
bool True if the playable has completed its operation, false otherwise.
Returns a flag indicating that a playable has completed its operation.
NOTE: This is a templated extension method that can be used on any type that inherits from IPlayable
If the duration of the playable is set, when the time of the playable reaches its duration during playback this flag will be set to true.