<?php

declare(strict_types=1);

namespace GrumPHP\Process;

use GrumPHP\Collection\ProcessArgumentsCollection;
use Symfony\Component\Process\Process;

/**
 * @internal
 */
final class ProcessFactory
{
    public static function fromArguments(ProcessArgumentsCollection $arguments): Process
    {
        return new Process($arguments->getValues());
    }
}

<?php

declare(strict_types=1);

namespace GrumPHP\Process;

use GrumPHP\Collection\ProcessArgumentsCollection;
use Symfony\Component\Process\Process;

/**
 * @internal
 */
final class ProcessFactory
{
    public static function fromArguments(ProcessArgumentsCollection $arguments): Process
    {
        // @todo Remove backward compatibility layer as soon as Symfony Process accepts an array (3.3+).
        //       From then on, you can simply pass `$arguments->getValues()` directly as the first constructor argument.
        $commandlineArgs = array_map(function ($argument) {
            return ProcessUtils::escapeArgument((string) $argument);
        }, $arguments->getValues());

        $commandline = implode(' ', $commandlineArgs);

        return new Process($commandline);
    }
}

--- 
+++ 
@@ -14,14 +14,6 @@
 {
     public static function fromArguments(ProcessArgumentsCollection $arguments): Process
     {
-        // @todo Remove backward compatibility layer as soon as Symfony Process accepts an array (3.3+).
-        //       From then on, you can simply pass `$arguments->getValues()` directly as the first constructor argument.
-        $commandlineArgs = array_map(function ($argument) {
-            return ProcessUtils::escapeArgument((string) $argument);
-        }, $arguments->getValues());
-
-        $commandline = implode(' ', $commandlineArgs);
-
-        return new Process($commandline);
+        return new Process($arguments->getValues());
     }
 }
Remove Old Compatibility Layer for Pre-5.x Symfony Process