
    <span class="token keyword">public</span> <span class="token class-name">GatewayFilter</span> <span class="token function">apply</span><span class="token punctuation">(</span><span class="token class-name">Object</span> config<span class="token punctuation">)</span> <span class="token punctuation">{</span>
        <span class="token keyword">return</span> <span class="token punctuation">(</span>exchange<span class="token punctuation">,</span> chain<span class="token punctuation">)</span> <span class="t