# Flutter之foundation库 ``` CLASSES AbstractNode BindingBase BitField CachingIterable Category ChangeNotifier Diagnosticable DiagnosticableNode DiagnosticableTree DiagnosticPropertiesBuilder DiagnosticsNode DiagnosticsProperty DocumentationIcon DoubleProperty EnumProperty Factory FlagProperty FlutterErrorDetails IntProperty IterableProperty Key LicenseEntry LicenseEntryWithLineBreaks LicenseParagraph LicenseRegistry Listenable LocalKey MessageProperty ObjectFlagProperty ObserverList PercentProperty ReadBuffer StringProperty Summary SynchronousFuture TextTreeConfiguration Unicode ValueKey ValueListenable ValueNotifier WriteBuffer MIXINS DiagnosticableTreeMixin CONSTANTS immutable kMaxUnsignedSMI kNoDefaultValue mustCallSuper optionalTypeArgs protected required timelineWhitelistArguments visibleForTesting PROPERTIES dashedTextConfiguration debugDefaultTargetPlatformOverride debugInstrumentationEnabled debugPrint debugPrintDone defaultTargetPlatform denseTextConfiguration singleLineTextConfiguration sparseTextConfiguration transitionTextConfiguration whitespaceTextConfiguration FUNCTIONS compute consolidateHttpClientResponseBytes debugAssertAllFoundationVarsUnset debugInstrumentAction debugPrintStack debugPrintSynchronously debugPrintThrottled debugWordWrap describeEnum describeIdentity listEquals profile setEquals shortHash ENUMS DiagnosticLevel DiagnosticsTreeStyle TargetPlatform TYPEDEFS AsyncCallback AsyncValueGetter AsyncValueSetter ComputeCallback ComputePropertyValueCallback DebugPrintCallback FlutterExceptionHandler InformationCollector IterableFilter LicenseEntryCollector ServiceExtensionCallback ValueChanged ValueGetter ValueSetter VoidCallback EXCEPTIONS FlutterError ```