Create a year dropdown field in a GiveWP form

givewp_year_dropdown.php

<?php
function getYears(): array
{
    $startYear = 1970;
    $currentYear = date('Y');
    return range($startYear, $currentYear);
}
add_action('givewp_donation_form_schema', static function (Give\Framework\FieldsAPI\DonationForm $form) {
    $field = Give\Framework\FieldsAPI\Select::make('grduation_year')
		->options(...getYears())		
		->emailTag('graduation_year');
    $form->insertAfter('email', $field);
});