 defined</p></dd></dl><dl><dt class="spec value" id="val-is_empty"><a href="#val-is_empty" class="anchor"></a><code><span class="keyword">val</span> is_empty : unit <span>&#45;&gt;</span> bool</code></dt><dd><p>whether there exists at least one captured source file</p></dd></dl><dl><dt class="spec value" id="val-is_freshly_captured"><a href="#val-is_freshly_captured" class="anchor"></a><code><span class="keyword">val</span> is_freshly_captured : <a href="../../IBase/SourceFile/index.html#type-t">IBase.Sourc