values
working around limitations of the <code>toString</code> implementation for Dart
enum types.</li>
<li><code>IterableProperty</code>, which handles iterable values with display
customizable depending on the <code>DiagnosticsTreeStyle</code> used.</li>
<li><code>ObjectFlagProperty</code>, which provides terse descriptions of whether a
property value is present or not. For example, whether an <code>onClick</code>
callback is specified or an animation is in progress.</li>
<li><code>ColorProperty</code>, w