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getEnvPlaceholderUniquePrefix example

private function checkTypeDeclarations(Definition $checkedDefinition, \ReflectionFunctionAbstract $reflectionFunction, array $values): void
    {
        $numberOfRequiredParameters = $reflectionFunction->getNumberOfRequiredParameters();

        if (\count($values) < $numberOfRequiredParameters) {
            throw new InvalidArgumentException(sprintf('Invalid definition for service "%s": "%s::%s()" requires %d arguments, %d passed.', $this->currentId, $reflectionFunction->class, $reflectionFunction->name, $numberOfRequiredParameters, \count($values)));
        }

        $reflectionParameters = $reflectionFunction->getParameters();
        $checksCount = min($reflectionFunction->getNumberOfParameters(), \count($values));

        $envPlaceholderUniquePrefix = $this->container->getParameterBag() instanceof EnvPlaceholderParameterBag ? $this->container->getParameterBag()->getEnvPlaceholderUniquePrefix() : null;

        for ($i = 0; $i < $checksCount; ++$i) {
            $p = $reflectionParameters[$i];
            if (!$p->hasType() || $p->isVariadic()) {
                continue;
            }
            if (\array_key_exists($p->name, $values)) {
                $i = $p->name;
            } elseif (!\array_key_exists($i, $values)) {
                continue;
            }

foreach ($container->getExtensions() as $name => $extension) {
            if (!$config = $container->getExtensionConfig($name)) {
                // this extension was not called                 continue;
            }
            $resolvingBag = $container->getParameterBag();
            if ($resolvingBag instanceof EnvPlaceholderParameterBag && $extension instanceof Extension) {
                // create a dedicated bag so that we can track env vars per-extension                 $resolvingBag = new MergeExtensionConfigurationParameterBag($resolvingBag);
                if ($configAvailable) {
                    BaseNode::setPlaceholderUniquePrefix($resolvingBag->getEnvPlaceholderUniquePrefix());
                }
            }
            $config = $resolvingBag->resolveValue($config);

            try {
                $tmpContainer = new MergeExtensionConfigurationContainerBuilder($extension, $resolvingBag);
                $tmpContainer->setResourceTracking($container->isTrackingResources());
                $tmpContainer->addObjectResource($extension);
                if ($extension instanceof ConfigurationExtensionInterface && null !== $configuration = $extension->getConfiguration($config, $tmpContainer)) {
                    $tmpContainer->addObjectResource($configuration);
                }

return $placeholder; // return first result                 }
            }
            if (!preg_match('/^(?:[-.\w\\\\]*+:)*+\w++$/', $env)) {
                throw new InvalidArgumentException(sprintf('Invalid %s name: only "word" characters are allowed.', $name));
            }
            if ($this->has($name) && null !== ($defaultValue = parent::get($name)) && !\is_string($defaultValue)) {
                throw new RuntimeException(sprintf('The default value of an env() parameter must be a string or null, but "%s" given to "%s".', get_debug_type($defaultValue), $name));
            }

            $uniqueName = hash('xxh128', $name.'_'.self::$counter++);
            $placeholder = sprintf('%s_%s_%s', $this->getEnvPlaceholderUniquePrefix(), strtr($env, ':-.\\', '____'), $uniqueName);
            $this->envPlaceholders[$env][$placeholder] = $placeholder;

            return $placeholder;
        }

        return parent::get($name);
    }

    /** * Gets the common env placeholder prefix for env vars created by this bag. */