"fc">&nbsp;        Assert.assertEquals(4, vertices.size());</b>
<b class="fc">&nbsp;        Assert.assertTrue(vertices.contains(c));</b>
<b class="fc">&nbsp;        Assert.assertTrue(vertices.contains(d1));</b>
<b class="fc">&nbsp;        Assert.assertTrue(vertices.contains(d2));</b>
<b class="fc">&nbsp;        int count = 0;</b>
<b class="fc">&nbsp;        for (Vertex vertex : vertices) {</b>
<b class="fc">&nbsp;            if (vertex.equals(c)) {</b>
<b class="fc">&nbsp;                count++;</b>
&nbsp;