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whenOrNull<TResult extends Object?> method Null safety

@optionalTypeArgs

TResult? whenOrNull<TResult extends Object?>(

{TResult? ref(
1. String name
)?,
TResult? union(
1. List<String> names,
2. String key
)?}

)

inherited

Implementation

@optionalTypeArgs
TResult? whenOrNull<TResult extends Object?>({
  TResult? Function(String name)? ref,
  TResult? Function(List<String> names, String key)? union,
}) =>
    throw _privateConstructorUsedError;