description

# Deprecated.instantiate constructor

const Deprecated.instantiate([

1. String? message

])

Creates an annotation which deprecates instantiating a class.

The annotation can be used on `class` declarations which can currently be instantiated, so they are not marked `abstract` or `sealed`, but where the ability to instantiate will be removed in a later release.

Any existing code which instantiates the annotated class will cause a warning that such use is deprecated.

The `message`, if given, is displayed as part of the warning. The message should be aimed at the programmer who owns the instantiating code, and should recommend an alternative (if available), and say when this functionality is expected to be removed if that is sooner or later than the next major version.

## Implementation

    const Deprecated.instantiate([this.message])
      : _kind = _DeprecationKind.instantiate;