Helper to create a paragraph UI message.
string $message: Message text.
string $type: Message type.
array Render array of message.
public function createMessage($message, $type = 'warning') {
return [
'#type' => 'container',
'#markup' => $message,
'#attributes' => [
'class' => [
'messages',
'messages--' . $type,
],
],
];
}