class="token punctuation">.</span>Model <span class="token operator">=</span> <span class="token punctuation">(</span><span class="token operator">*</span>Article<span class="token punctuation">)</span><span class="token punctuation">(</span><span class="token boolean">nil</span><span class="token punctuation">)</span>

<span class="token keyword">type</span> Article <span class="token keyword">struct</span> <span class="token punctuation">{</span>
    models<span class="token punctuation">.</span>BaseModel