 that an expression representing an objc block can be null and raise a <code>B1</code> null exception. It's used to check that we don't call possibly null blocks</p></dd></dl><dl><dt class="spec value" id="val-rearrange"><a href="#val-rearrange" class="anchor"></a><code><span class="keyword">val</span> rearrange : <span>?&#8288;report_deref_errors:bool</span> <span>&#45;&gt;</span> <span><a href="../BiabductionSummary/index.html#type-t">BiabductionSummary.t</a> <a href="../../Absint/InterproceduralAnalysis/