> (uint32_t length);</div><div class="line"><a name="l00038"></a><span class="lineno">   38</span>&#160;</div><div class="line"><a name="l00039"></a><span class="lineno">   39</span>&#160;<span class="keyword">protected</span>:</div><div class="line"><a name="l00040"></a><span class="lineno">   40</span>&#160;    <span class="keywordtype">float</span> getPosition (uint32_t milliseconds) <span class="keyword">override</span>;</div><div class="line"><a name="l00041"></a><span class="lineno">   41</span>&#160;