for that
callback to complete before allowing new posts on the signal.</p>
<p>If <cite>ignorePast</cite> is <tt class="docutils literal"><span class="pre">false</span></tt> or not present, then before
<a class="reference internal" href="#Interest" title="Interest"><tt class="xref py py-meth docutils literal"><span class="pre">Interest()</span></tt></a> returns, the callback will be called with all
the past messages that have been sent to the signal.</p>
<table class="docutils field-list" frame="void" rules=