Alters the list of options to be displayed for a field.
This hook can notably be used to change the label of the empty option.
array $options: The array of options for the field, as returned by hook_options_list(). An empty option (_none) might have been added, depending on the field properties.
array $context: An associative array containing:
function hook_options_list_alter(array &$options, array $context) {
// Check if this is the field we want to change.
if ($context['field']
->id() == 'field_option') {
// Change the label of the empty option.
$options['_none'] = t('== Empty ==');
}
}