le for assembling an S2Builder::Graph of snapped edges into the
 desired output format (e.g., an S2Polygon).  The GraphOptions class allows
 each Layer type to specify requirements on its input graph: for example, if
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						<td>
							<code>
								<a id="S2Builder" class="public" href="../s2/s2builder/S2Builder.html">S2Builder</a>
							</code>
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						<td>S2Builder is a tool for assembling polygonal geometry from edges.  Here are
 some of the things it is designed fo