leagueContainer property or the `getLeagueContainer` method * from the ContainerAwareTrait. * * @return void */ public function register(); /** * Set a custom id for the service provider. This enables * registering the same service provider multiple times. * * @param string $id * * @return self */ public function setIdentifier(string $id) : ServiceProviderInterface; /** * The id of the service provider uniquely identifies it, so * that we can quickly determine if it has already been registered. * Defaults to get_class($provider). * * @return string */ public function getIdentifier() : string; }