learn-symfony / css-compiler

ScriptHandler.php

<?php

namespace EM\CssCompiler\Handler;

use Composer\EventDispatcher\Event;
use EM\CssCompiler\ScriptHandler as Handler;

/**
 * @deprecated
 */
class ScriptHandler extends Handler
{
    public static function compileCSS(Event $event)
    {
        static::generateCSS($event);

$event of type object<Composer\EventDispatcher\Event> is not a sub-type of object<Composer\Script\Event>. It seems like you assume a child class of the class Composer\EventDispatcher\Event to be always present.

    }
}