pan><span class="sd">&quot;&quot;&quot;</span>
<span class="sd">        Take the internal structure and make sure it satisfies the requirement that all edges have adjacent function values. </span>
<span class="sd">        &quot;&quot;&quot;</span>

        <span class="c1"># If we&#39;re initializing with nothing, this should pass. </span>
        <span class="c1"># Note that if self.n_low is None, then self.n_high and self.delta</span>
        <span class="c1"># are both None as well but I am not currently