s="token punctuation">.</span><span class="token function">lookup</span><span class="token punctuation">(</span><span class="token string">'service:flash-messages'</span><span class="token punctuation">)</span><span class="token punctuation">;</span>

    service<span class="token punctuation">.</span><span class="token function">add</span><span class="token punctuation">(</span><span class="token string">'Hello'</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
    serv