ribing a <a href="dart-ui/Path-class.html">Path</a>.</p>
<p>A <a href="dart-ui/PathMetrics-class.html">PathMetrics</a> object is created by using the <a href="dart-ui/Path/computeMetrics.html">Path.computeMetrics</a> method,
and represents the path as it stood at the time of the call. Subsequent
modifications of the path do not affect the <a href="dart-ui/PathMetrics-class.html">PathMetrics</a> object.</p>
<p>Each path metric corresponds to a segment, or contour, of a path.</p>
<p>For example, a path consis