 a function <code>find</code> which takes three parameters of type Object,
					all of which are optional.
					The result of the <code>find</code> function is an <dfn data-lt="iterators">Iterator</dfn>
					object with two functions: 
				</p>
				<ul>
					<li>
						<code>next()</code> either returns a <code>Triple</code> or <code>null</code> if the iteration has been exhausted.
					</li>
					<li>
						<code>close()</code> terminates the <a>Iterator</a> and releases any resources allocated by it.
				