<?php return [
    'SomeName1' => [
        'callback' => [
            0 => function($v1, $v2, $v3) {},
            1 => function($v1, $v2, $v3) {},
        ],
    ],
    'SomeName2' => [
        'callback' => [
            0 => function($v4) {},
        ],
    ],
];