Annotate IContainer so Psalm knows what resove and query return

Signed-off-by: Christoph Wurst <christoph@winzerhof-wurst.at>

lib/public/IContainer.php

@@ -52,10 +52,14 @@ use Psr\Container\ContainerInterface;
 interface IContainer extends ContainerInterface {
 
 	/**
+	 * @template T
+	 *
 	 * If a parameter is not registered in the container try to instantiate it
 	 * by using reflection to find out how to build the class
 	 * @param string $name the class name to resolve
+	 * @psalm-param string|class-string<T> $name
 	 * @return \stdClass
+	 * @psalm-return ($name is class-string ? T : mixed)
 	 * @since 8.2.0
 	 * @deprecated 20.0.0 use \Psr\Container\ContainerInterface::get
 	 * @throws ContainerExceptionInterface if the class could not be found or instantiated
@@ -66,9 +70,13 @@ interface IContainer extends ContainerInterface {
 	/**
 	 * Look up a service for a given name in the container.
 	 *
+	 * @template T
+	 *
 	 * @param string $name
+	 * @psalm-param string|class-string<T> $name
 	 * @param bool $autoload Should we try to autoload the service. If we are trying to resolve built in types this makes no sense for example
 	 * @return mixed
+	 * @psalm-return ($name is class-string ? T : mixed)
 	 * @throws ContainerExceptionInterface if the query could not be resolved
 	 * @throws QueryException if the query could not be resolved
 	 * @since 6.0.0