Symfony\Component\DependencyInjection\Loader\YamlFileLoader::parseDefinition PHP Method

    private function parseDefinition($id, $service, $file)
    {
        if (is_string($service) && 0 === strpos($service, '@')) {
            $this->container->setAlias($id, substr($service, 1));

            return;
        }

        if (!is_array($service)) {
            throw new InvalidArgumentException(sprintf('A service definition must be an array or a string starting with "@" but %s found for service "%s" in %s. Check your YAML syntax.', gettype($service), $id, $file));
        }

        static::checkDefinition($id, $service, $file);

        if (isset($service['alias'])) {
            $public = !array_key_exists('public', $service) || (bool) $service['public'];
            $this->container->setAlias($id, new Alias($service['alias'], $public));

            foreach ($service as $key => $value) {
                if (!in_array($key, array('alias', 'public'))) {
                    @trigger_error(sprintf('The configuration key "%s" is unsupported for the service "%s" which is defined as an alias in "%s". Allowed configuration keys for service aliases are "alias" and "public". The YamlFileLoader will raise an exception in Symfony 4.0, instead of silently ignoring unsupported attributes.', $key, $id, $file), E_USER_DEPRECATED);
                }
            }

            return;
        }

        if (isset($service['parent'])) {
            $definition = new ChildDefinition($service['parent']);
        } else {
            $definition = new Definition();
        }

        if (isset($service['class'])) {
            $definition->setClass($service['class']);
        }

        if (isset($service['shared'])) {
            $definition->setShared($service['shared']);
        }

        if (isset($service['synthetic'])) {
            $definition->setSynthetic($service['synthetic']);
        }

        if (isset($service['lazy'])) {
            $definition->setLazy($service['lazy']);
        }

        if (isset($service['public'])) {
            $definition->setPublic($service['public']);
        }

        if (isset($service['abstract'])) {
            $definition->setAbstract($service['abstract']);
        }

        if (array_key_exists('deprecated', $service)) {
            $definition->setDeprecated(true, $service['deprecated']);
        }

        if (isset($service['factory'])) {
            $definition->setFactory($this->parseCallable($service['factory'], 'factory', $id, $file));
        }

        if (isset($service['file'])) {
            $definition->setFile($service['file']);
        }

        if (isset($service['arguments'])) {
            $definition->setArguments($this->resolveServices($service['arguments']));
        }

        if (isset($service['properties'])) {
            $definition->setProperties($this->resolveServices($service['properties']));
        }

        if (isset($service['configurator'])) {
            $definition->setConfigurator($this->parseCallable($service['configurator'], 'configurator', $id, $file));
        }

        if (isset($service['calls'])) {
            if (!is_array($service['calls'])) {
                throw new InvalidArgumentException(sprintf('Parameter "calls" must be an array for service "%s" in %s. Check your YAML syntax.', $id, $file));
            }

            foreach ($service['calls'] as $call) {
                if (isset($call['method'])) {
                    $method = $call['method'];
                    $args = isset($call['arguments']) ? $this->resolveServices($call['arguments']) : array();
                } else {
                    $method = $call[0];
                    $args = isset($call[1]) ? $this->resolveServices($call[1]) : array();
                }

                $definition->addMethodCall($method, $args);
            }
        }

        if (isset($service['tags'])) {
            if (!is_array($service['tags'])) {
                throw new InvalidArgumentException(sprintf('Parameter "tags" must be an array for service "%s" in %s. Check your YAML syntax.', $id, $file));
            }

            foreach ($service['tags'] as $tag) {
                if (!is_array($tag)) {
                    $tag = array('name' => $tag);
                }

                if (!isset($tag['name'])) {
                    throw new InvalidArgumentException(sprintf('A "tags" entry is missing a "name" key for service "%s" in %s.', $id, $file));
                }

                if (!is_string($tag['name']) || '' === $tag['name']) {
                    throw new InvalidArgumentException(sprintf('The tag name for service "%s" in %s must be a non-empty string.', $id, $file));
                }

                $name = $tag['name'];
                unset($tag['name']);

                foreach ($tag as $attribute => $value) {
                    if (!is_scalar($value) && null !== $value) {
                        throw new InvalidArgumentException(sprintf('A "tags" attribute must be of a scalar-type for service "%s", tag "%s", attribute "%s" in %s. Check your YAML syntax.', $id, $name, $attribute, $file));
                    }
                }

                $definition->addTag($name, $tag);
            }
        }

        if (isset($service['decorates'])) {
            if ('' !== $service['decorates'] && '@' === $service['decorates'][0]) {
                throw new InvalidArgumentException(sprintf('The value of the "decorates" option for the "%s" service must be the id of the service without the "@" prefix (replace "%s" with "%s").', $id, $service['decorates'], substr($service['decorates'], 1)));
            }

            $renameId = isset($service['decoration_inner_name']) ? $service['decoration_inner_name'] : null;
            $priority = isset($service['decoration_priority']) ? $service['decoration_priority'] : 0;
            $definition->setDecoratedService($service['decorates'], $renameId, $priority);
        }

        if (isset($service['autowire'])) {
            if (is_array($service['autowire'])) {
                $definition->setAutowiredMethods($service['autowire']);
            } else {
                $definition->setAutowired($service['autowire']);
            }
        }

        if (isset($service['autowiring_types'])) {
            if (is_string($service['autowiring_types'])) {
                $definition->addAutowiringType($service['autowiring_types']);
            } else {
                if (!is_array($service['autowiring_types'])) {
                    throw new InvalidArgumentException(sprintf('Parameter "autowiring_types" must be a string or an array for service "%s" in %s. Check your YAML syntax.', $id, $file));
                }

                foreach ($service['autowiring_types'] as $autowiringType) {
                    if (!is_string($autowiringType)) {
                        throw new InvalidArgumentException(sprintf('A "autowiring_types" attribute must be of type string for service "%s" in %s. Check your YAML syntax.', $id, $file));
                    }

                    $definition->addAutowiringType($autowiringType);
                }
            }
        }

        $this->container->setDefinition($id, $definition);
    }