> returns the
                    length of the concatenation of the source strings
                    that make up the shader source for the
                    <em class="parameter"><code>shader</code></em>, including the null
                    termination character. (i.e., the size of the
                    character buffer required to store the shader
                    source). If no source code exists, 0 is
                    returned.</p>
            </dd>
          </dl>
        </div>
      <