in the package’s on_start() method add
<?php
$this->app->bind(
'\Concrete\Block\Image\Controller',
'\Namespace\For\The\New\Image\Controller'
);
You have to do it that way in v9 because, for some reason, doing it the way below doesn’t work:
<?php
use Concrete\Block\Image\Controller as CoreImageController;
use Namespace\For\The\New\Image\Controller as ImageController;
$this->app->bind(
CoreImageController::class,
ImageController::class
);
That way works in v8 though