src/Operator/Processor/PrefixProcessor.php
public static function all(CommandInterface $command, $prefix)
    {
        if ($arguments = $command->getArguments()) {
            foreach ($arguments as &$key) {
                $key = "$prefix$key";
            }
            $arguments = [$arguments];

            $command->setRawArguments($arguments);
        }
    }
public static function all(CommandInterface $command, $prefix)
    {
        if ($arguments = $command->getArguments()) {
            foreach ($arguments as &$key) {
                $key = "$prefix$key";
            }
            $arguments = [$arguments];

            $command->setRawArguments($arguments);
        }
    }
Applies the specified prefix to all the arguments.

@param CommandInterface $command Command instance.
@param string           $prefix  Prefix string.