d</span><span class="p">:</span> <span class="n">GraphObjectId</span>
    <span class="n">destination_id</span><span class="p">:</span> <span class="n">GraphObjectId</span>
    <span class="n">source_output_index</span><span class="p">:</span> <span class="n">typing</span><span class="o">.</span><span class="n">Optional</span><span class="p">[</span><span class="nb">float</span><span class="p">]</span>

    <span class="nd">@classmethod</span>
    <span class="k">def</span> <span class="nf">from_json</span>