[4.0] Replace deprecated Joomla\DI\Container::exists() calls

libraries/joomla/base/adapter.php

@@ -168,7 +168,7 @@ public function setAdapter($name, &$adapter = null, $options = array())
 		}
 
 		// Check for a possible service from the container otherwise manually instantiate the class
-		if (Factory::getContainer()->exists($class))
+		if (Factory::getContainer()->has($class))
 		{
 			$this->_adapters[$name] = Factory::getContainer()->get($class);
 		}

libraries/src/Application/CMSApplication.php

@@ -406,7 +406,7 @@ public static function getInstance($name = null, $prefix = '\JApplication', Cont
 				$container = Factory::getContainer();
 			}
 
-			if ($container->exists($classname))
+			if ($container->has($classname))
 			{
 				static::$instances[$name] = $container->get($classname);
 			}

libraries/src/Factory.php

@@ -395,7 +395,7 @@ public static function getDbo()
 
 		if (!self::$database)
 		{
-			if (self::getContainer()->exists('DatabaseDriver'))
+			if (self::getContainer()->has('DatabaseDriver'))
 			{
 				self::$database = self::getContainer()->get('DatabaseDriver');
 			}

libraries/src/Installer/Installer.php

@@ -2412,7 +2412,7 @@ public function loadAdapter($adapter, $options = array())
 		$options['type'] = $adapter;
 
 		// Check for a possible service from the container otherwise manually instantiate the class
-		if (Factory::getContainer()->exists($class))
+		if (Factory::getContainer()->has($class))
 		{
 			return Factory::getContainer()->get($class);
 		}

libraries/src/MVC/Controller/BaseController.php

@@ -339,7 +339,7 @@ public static function getInstance($prefix, $config = array())
 		}
 
 		// Check for a possible service from the container otherwise manually instantiate the class
-		if (Factory::getContainer()->exists($class))
+		if (Factory::getContainer()->has($class))
 		{
 			self::$instance = Factory::getContainer()->get($class);
 		}

libraries/src/Router/Router.php

@@ -110,7 +110,7 @@ public static function getInstance($client, $options = array())
 			}
 
 			// Check for a possible service from the container otherwise manually instantiate the class
-			if (Factory::getContainer()->exists($classname))
+			if (Factory::getContainer()->has($classname))
 			{
 				self::$instances[$client] = Factory::getContainer()->get($classname);
 			}

libraries/src/Table/Table.php

@@ -312,7 +312,7 @@ public static function getInstance($type, $prefix = 'JTable', $config = array())
 		$db = $config['dbo'] ?? Factory::getDbo();
 
 		// Check for a possible service from the container otherwise manually instantiate the class
-		if (Factory::getContainer()->exists($tableClass))
+		if (Factory::getContainer()->has($tableClass))
 		{
 			return Factory::getContainer()->get($tableClass);
 		}