nt range querying
 of items bounded by 2D rectangles.  
 <CODE>Geometry</CODE>s can be indexed by using their
 <A HREF="../../../../../com/vividsolutions/jts/geom/Envelope.html" title="class in com.vividsolutions.jts.geom"><CODE>Envelope</CODE></A>s.
 Any type of Object can also be indexed as
 long as it has an extent that can be represented by an <A HREF="../../../../../com/vividsolutions/jts/geom/Envelope.html" title="class in com.vividsolutions.jts.geom"><CODE>Envelope</CODE></A>.
 <p>
 This Quadtree ind