rst object with exists == false,
		 or, finding none, add a new object to the array,
		 doubling the size of the array if necessary.</p>
		 
		 <p>WARNING: If this function needs to create a new object,
		 and no object class was provided, it will return null
		 instead of a valid object!</p>
		 
		 </p><p><span class="label"> Parameters </span><table cellpadding="0" cellspacing="0" border="0"><tr><td width="20px"></td><td><code><span class="label">ObjectClass</span>:Class</code> (default = <code>null</code