element_info_test.module

<?php


/**
 * @file
 * Element info test.
 */
use Drupal\element_info_test\ElementInfoTestNumberBuilder;

/**
 * Implements hook_element_info_alter().
 */
function element_info_test_element_info_alter(array &$info) {
    $info['number'] += [
        '#pre_render' => [],
    ];
    
    /* @see \Drupal\KernelTests\Core\Render\Element\WeightTest::testProcessWeightSelectMax() */
    $info['number']['#pre_render'][] = [
        ElementInfoTestNumberBuilder::class,
        'preRender',
    ];
}

/**
 * Implements hook_element_plugin_alter().
 */
function element_info_test_element_plugin_alter(array &$definitions) {
    if (\Drupal::state()->get('hook_element_plugin_alter:remove_weight', FALSE)) {
        unset($definitions['weight']);
    }
}