*[https://dart.dev/guides/language/spec 言語仕様]
*[https://dart.dev/guides/language/specifications/DartLangSpec-v2.10.pdf 言語仕様2.1]
==[https://dart.dev/guides/language/effective-dart/design#prefer-type-annotating-public-fields-and-top-level-variables-if-the-type-isnt-obvious Effective Dart]==
*[https://dart.dev/guides/language/effective-dart/design#prefer-type-annotating-public-fields-and-top-level-variables-if-the-type-isnt-obvious Effective Dart]
==基本==