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diff --git a/vendor/drupal/console/src/Command/ContainerDebugCommand.php b/vendor/drupal/console/src/Command/ContainerDebugCommand.php
new file mode 100644
index 000000000..db128a41a
--- /dev/null
+++ b/vendor/drupal/console/src/Command/ContainerDebugCommand.php
@@ -0,0 +1,157 @@
+<?php
+
+/**
+ * @file
+ * Contains \Drupal\Console\Command\ContainerDebugCommand.
+ */
+
+namespace Drupal\Console\Command;
+
+use Symfony\Component\Console\Input\InputInterface;
+use Symfony\Component\Console\Output\OutputInterface;
+use Symfony\Component\Console\Input\InputArgument;
+use Symfony\Component\Console\Input\InputOption;
+use Symfony\Component\Console\Command\Command;
+use Symfony\Component\Yaml\Yaml;
+use Drupal\Console\Core\Command\Shared\ContainerAwareCommandTrait;
+use Drupal\Console\Core\Style\DrupalStyle;
+
+/**
+ * Class ContainerDebugCommand
+ *
+ * @package Drupal\Console\Command
+ */
+class ContainerDebugCommand extends Command
+{
+    use ContainerAwareCommandTrait;
+
+    /**
+     * {@inheritdoc}
+     */
+    protected function configure()
+    {
+        $this
+            ->setName('container:debug')
+            ->setDescription($this->trans('commands.container.debug.description'))
+            ->addOption(
+                'parameters',
+                null,
+                InputOption::VALUE_NONE,
+                $this->trans('commands.container.debug.arguments.service')
+            )
+            ->addArgument(
+                'service',
+                InputArgument::OPTIONAL,
+                $this->trans('commands.container.debug.arguments.service')
+            );
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    protected function execute(InputInterface $input, OutputInterface $output)
+    {
+        $io = new DrupalStyle($input, $output);
+        $service = $input->getArgument('service');
+        $parameters = $input->getOption('parameters');
+
+        if ($parameters) {
+            $parameterList = $this->getParameterList();
+            ksort($parameterList);
+            $io->write(Yaml::dump(['parameters' => $parameterList], 4, 2));
+
+            return 0;
+        }
+
+        $tableHeader = [];
+        if ($service) {
+            $tableRows = $this->getServiceDetail($service);
+            $io->table($tableHeader, $tableRows, 'compact');
+
+            return 0;
+        }
+
+        $tableHeader = [
+            $this->trans('commands.container.debug.messages.service_id'),
+            $this->trans('commands.container.debug.messages.class_name')
+        ];
+
+        $tableRows = $this->getServiceList();
+        $io->table($tableHeader, $tableRows, 'compact');
+
+        return 0;
+    }
+
+    private function getServiceList()
+    {
+        $services = [];
+        $serviceDefinitions = $this->container
+            ->getParameter('console.service_definitions');
+
+        foreach ($serviceDefinitions as $serviceId => $serviceDefinition) {
+            $services[] = [$serviceId, $serviceDefinition->getClass()];
+        }
+        return $services;
+    }
+
+    private function getServiceDetail($service)
+    {
+        $serviceInstance = $this->get($service);
+        $serviceDetail = [];
+
+        if ($serviceInstance) {
+            $serviceDetail[] = [
+                $this->trans('commands.container.debug.messages.service'),
+                $service
+            ];
+            $serviceDetail[] = [
+                $this->trans('commands.container.debug.messages.class'),
+                get_class($serviceInstance)
+            ];
+            $serviceDetail[] = [
+                $this->trans('commands.container.debug.messages.interface'),
+                Yaml::dump(class_implements($serviceInstance))
+            ];
+            if ($parent = get_parent_class($serviceInstance)) {
+                $serviceDetail[] = [
+                    $this->trans('commands.container.debug.messages.parent'),
+                    $parent
+                ];
+            }
+            if ($vars = get_class_vars($serviceInstance)) {
+                $serviceDetail[] = [
+                    $this->trans('commands.container.debug.messages.variables'),
+                    Yaml::dump($vars)
+                ];
+            }
+            if ($methods = get_class_methods($serviceInstance)) {
+                $serviceDetail[] = [
+                    $this->trans('commands.container.debug.messages.methods'),
+                    Yaml::dump($methods)
+                ];
+            }
+        }
+
+        return $serviceDetail;
+    }
+
+    private function getParameterList()
+    {
+        $parameters = array_filter(
+            $this->container->getParameterBag()->all(), function ($name) {
+                if (preg_match('/^container\./', $name)) {
+                    return false;
+                }
+                if (preg_match('/^drupal\./', $name)) {
+                    return false;
+                }
+                if (preg_match('/^console\./', $name)) {
+                    return false;
+                }
+                return true;
+            }, ARRAY_FILTER_USE_KEY
+        );
+
+        return $parameters;
+    }
+}