Callback constructor

const Callback({
  1. FutureOr<void> onConfigure(
    1. Database database
    )?,
  2. FutureOr<void> onCreate(
    1. Database database,
    2. int version
    )?,
  3. FutureOr<void> onOpen(
    1. Database database
    )?,
  4. FutureOr<void> onUpgrade(
    1. Database database,
    2. int startVersion,
    3. int endVersion
    )?,
})

Constructor.

Implementation

const Callback(
    {this.onConfigure, this.onCreate, this.onOpen, this.onUpgrade});