an><span class="p">:</span> <span class="s2">&quot;param_b&quot;</span>
  <span class="n">value</span> <span class="p">{</span>
    <span class="n">spec</span> <span class="p">{</span>
      <span class="n">double_spec</span> <span class="p">{</span>
        <span class="n">default_value</span> <span class="p">{</span>
          <span class="n">value</span><span class="p">:</span> <span class="mf">40.0</span>
        <span class="p">}</span>
        <span class="n">units</span> <span class="p">{</span>
    