https://codeql.github.com/codeql-standard-libraries/javascript/type.@jsdoc_nullable_type_expr.html
@jsdoc_nullable_type_expr
API documentation for CodeQL
nullable typejsdocexpr
https://deepsource.com/directory/dart-analyze/issues/DRT-W1549
A class can't extend a nullable type (DRT-W1549) ・ Dart Analyze
Learn about A class can't extend a nullable type (DRT-W1549) in Dart Analyze.
a classnullable typeextenddrtdart
https://slack-chats.kotlinlang.org/t/488340/u4ttc4lgm-use-a-nullable-type-when-querying-for-the-property
nikolaymetchev use a nullable type when querying for the kotlinlang #gradle
nullable typefor theusequeryinggradle