ting of a <a href="dart-ui/Path/lineTo.html">Path.lineTo</a>, a <a href="dart-ui/Path/moveTo.html">Path.moveTo</a>, and
another <a href="dart-ui/Path/lineTo.html">Path.lineTo</a> will contain two contours and thus be represented by
two <a href="dart-ui/PathMetric-class.html">PathMetric</a> objects.</p>
<p>When iterating across a <a href="dart-ui/PathMetrics-class.html">PathMetrics</a>' contours, the <a href="dart-ui/PathMetric-class.html">PathMetric</a> objects are only
valid until the next one is obtained.