n class="pre">INTERFACE</span></code>, <code class="docutils literal notranslate"><span class="pre">PUBLIC</span></code> and <code class="docutils literal notranslate"><span class="pre">PRIVATE</span></code> keywords are required to
specify the scope of the source file paths (<code class="docutils literal notranslate"><span class="pre">&lt;items&gt;</span></code>) that follow
them.  <code class="docutils literal notranslate"><span class="pre">PRIVATE</span></code> and <code class="docutils literal notransla