ation.
Common named parameters in <code>DiagnosticsNode</code> subclasses help filter when
and how properties are displayed.</p>
<p><code>defaultValue</code>, <code>showName</code>, <code>showSeparator</code>, and <code>level</code> keep string
representations of diagnostics terse and hide properties when they are not
very useful.</p>
<ul>
<li>Use <code>defaultValue</code> any time the default value of a property is
uninteresting. For example, specify a default value of null any time
a property being null d