;discrete&quot;</span>
<span class="sd">                        &quot;values&quot;: {</span>
<span class="sd">                            &quot;H&quot;: &lt;Value for hydrogen&gt;</span>
<span class="sd">                            ...</span>
<span class="sd">                        }</span>
<span class="sd">                    }</span>
<span class="sd">                    }</span>
<span class="sd">                }</span>
<span class="sd">            flatten(bool): Whether to flatten out the result.</span>