optionalDependenciesNullable property

String get optionalDependenciesNullable

An explanation that optional dependencies are expected to be nullable.

Implementation

String get optionalDependenciesNullable =>
    'For constructors or functions that are potentially invoked by '
    'dependency injection, nullable types (i.e. "Engine?") must be annotated '
    '@Optional(), and likewise parameters annotated with @Optional() must be '
    'nullable in opted-in libraries (i.e. "@Optional() Engine?")';