Lifecycle methods

`check`

The check method reads every row and index entry of the committed database, and every page that holds them, and resolves when all of them are sound. Read more.

`close`

The close method detaches this Client and releases its prepared statements and Worker. Other Clients for the same OPFS name stay connected; ownership transfers automatically when necessary. Repeated calls share the same asynchronous cleanup. A closed Client cannot resume; create a new one and recreate its prepared statements and subscriptions. Closing is not a cancellation or rollback guarantee for a write already in flight. Read more.

`getSchema`

The getSchema method reads the database's tables, with their columns, primary keys, and indexes, as the engine's catalog holds them. Read more.

`setSchema`

The setSchema method makes the database's tables, columns, primary keys, and indexes match a Schema, as getSchema returns one, in one change that commits whole or not at all. Read more.