p>The starting line in the original source, relative to the previous source line.

</p>

            </div>
            
            <div class="content"><div class='highlight'><pre>        buffer += <span class="property">@encodeVlq</span> mapping.sourceLine - lastSourceLine
        <span class="keyword">if</span> lastSourceLine <span class="keyword">isnt</span> mapping.sourceLine
          lastSourceLine = mapping.sourceLine
          lastSourceColumn = <span class="number">0</span></pre></div></div>
    