>
  A directed or undirected graph. The graph's type must be a model of
  <a href="./VertexAndEdgeListGraph.html">VertexAndEdgeListGraph</a>. In most cases, the
  graph must have an internal <tt>vertex_index</tt> property map.
</blockquote>

 IN: <tt>VertexPropertyWriter vpw</tt>
<blockquote>
  A functor that models <a href="./write-graphviz.html#concept:PropertyWriter">PropertyWriter</a> to print
  properties of a vertex.<br>
<b>Default</b>: <tt>default_writer()</tt>
</blockquote>

 IN: <tt>EdgePropertyWri