Add configure attribute

[Jeroen-G]

// Will get the value set in config/app.php
#[Configure(['$message' => '%app.message%'])]

// Will inject an instance of the Message class
#[Configure(['$message' => '@App\Domain\Message'])]

// When you have multiple constructor arguments
#[Configure(['$message' => '%app.message%', '$logger' => '@Psr\Log\LoggerInterface'])]