anchor.diff:    "indexed_db": const LibraryInfo(
         "indexed_db/dartium/indexed_db_dartium.dart",
         category: "Client",
  +      maturity: Maturity.WEB_STABLE,
         dart2jsPath: "indexed_db/dart2js/indexed_db_dart2js.dart"),
   
     "io": const LibraryInfo(
         "io/io.dart",
         category: "Server",
  +      maturity: Maturity.STABLE,
         dart2jsPatchPath: "_internal/lib/io_patch.dart"),
   
     "isolate": const LibraryInfo(
         "isolate/isolate.dart",
  +      maturity: Maturity.STABLE,
         dart2jsPatchPath: "_internal/lib/isolate_patch.dart"),
   
     "js": const LibraryInfo(
         "js/dartium/js_dartium.dart",
         category: "Client",
  +      maturity: Maturity.STABLE,
         dart2jsPath: "js/dart2js/js_dart2js.dart"),
   
     "json": const LibraryInfo(
  -      "json/json.dart"),
  +      "json/json.dart",
  +      maturity: Maturity.DEPRECATED),
   
     "math": const LibraryInfo(
         "math/math.dart",
  +      maturity: Maturity.STABLE,
         dart2jsPatchPath: "_internal/lib/math_patch.dart"),
   
     "mirrors": const LibraryInfo(
         "mirrors/mirrors.dart",
  +      maturity: Maturity.UNSTABLE, 
         dart2jsPatchPath: "_internal/lib/mirrors_patch.dart"),
   
     "nativewrappers": const LibraryInfo(
  
positive.code:                     this.dart2jsPatchPath,
                      this.implementation: false,
                      this.documented: true,
                      this.platforms: DART2JS_PLATFORM | VM_PLATFORM});
  
    bool get isDart2jsLibrary => (platforms & DART2JS_PLATFORM) != 0;
    bool get isVmLibrary => (platforms & VM_PLATFORM) != 0;
  }
  
negative.code: 
    "async": const LibraryInfo(
        "async/async.dart",
        maturity: Maturity.STABLE,
        dart2jsPatchPath: "_internal/lib/async_patch.dart"),
  
    "chrome": const LibraryInfo(
        "chrome/dart2js/chrome_dart2js.dart",
        maturity: Maturity.DEPRECATED,
        category: "Client"),
  
    "collection": const LibraryInfo(
        "collection/collection.dart",
        maturity: Maturity.STABLE,
        dart2jsPatchPath: "_internal/lib/collection_patch.dart"),
  
    "convert": const LibraryInfo(
        "convert/convert.dart",
        maturity: Maturity.STABLE,
        dart2jsPatchPath: "_internal/lib/convert_patch.dart"),
  
    "core": const LibraryInfo(
        "core/core.dart",
        maturity: Maturity.STABLE,
        dart2jsPatchPath: "_internal/lib/core_patch.dart"),
  
    "html": const LibraryInfo(
        "html/dartium/html_dartium.dart",
        category: "Client",
        maturity: Maturity.WEB_STABLE,
        dart2jsPath: "html/dart2js/html_dart2js.dart"),
  
    "html_common": const LibraryInfo(
        "html/html_common/html_common.dart",
        category: "Client",
        maturity: Maturity.WEB_STABLE,
        dart2jsPath: "html/html_common/html_common_dart2js.dart",
        documented: false,
        implementation: true),
  