public function populate(array $fieldDefinition, FieldModel $field, $fieldHandle, FieldGroupModel $group = null)
{
parent::populate($fieldDefinition, $field, $fieldHandle, $group);
$options = [];
$settings = $fieldDefinition['settings'];
foreach ($settings['options'] as $option) {
$options[$option] = $option;
}
$settings['options'] = $options;
$field->settings = $settings;
}