chor"></a><code>violation_type : <a href="../OverAnnotatedRule/index.html#type-violation_type">OverAnnotatedRule.violation_type</a>;</code></td></tr></table><code>}</code></td></tr><tr id="type-err_instance.Nullable_dereference" class="anchored"><td class="def constructor"><a href="#type-err_instance.Nullable_dereference" class="anchor"></a><code>| </code><code><span class="constructor">Nullable_dereference</span> <span class="keyword">of</span> </code><code>{</code><table class="record"><tr id="type-err_in