Translations:API:Extensions/38/en

includes several methods for performing various checks, for example,
 * If you need to assert that exactly one of a set of parameters was supplied, use.
 * If you need to assert that at most one of a set of parameters was supplied, use.
 * If you need to assert that at least one of a set of parameters was supplied, use.
 * If you need to assert that the user has certain rights, use.
 * If you need to assert that the user can take an action on a particular page, use.
 * If the user is blocked (and that matters to your module), pass the  object to.