buildExtensions property Null safety

Map<String, List<String>> buildExtensions
override

'.mdt' makes the build_runner run MarkdownTemplateBuilder for every file with a .mdt extension This builder stores the result in the DocumentationModel resource to be further processed by other Builders. the buildExtension outputs therefore do not matter ('dummy.dummy') .

Implementation

@override
Map<String, List<String>> get buildExtensions => {
      '.mdt': ['dummy.dummy']
    };