optionalBuilder abstract method

Widget? optionalBuilder(List<Object> argsKey, DynamicMap builderArg)

Builds the widget builder at the given key.

If the node is not a widget builder, returns null.

See also:

• builder, which returns an ErrorWidget instead of null if the widget builder is missing.

Implementation

Widget? optionalBuilder(List<Object> argsKey, DynamicMap builderArg);