UserField::checkAccessField

static function checkAccessField($fieldId)
{
	$result = false;
	if ($fieldId > 0)
	{
		$entity = new CUserTypeEntity();
		$res = $entity->getList(
			[],
			[
				'ENTITY_ID' => static::getTargetEntityId(),
				'ID' => $fieldId
			]
		);

		if ($field = $res->fetch())
		{
			if (mb_strpos($field['FIELD_NAME'], static::$nameFullPrefix) === 0)
			{
				$result = true;
			}
		}
	}

	return $result;
}