node at the top of the stack without popping the stack.
 Special purpose method for TransformerImpl, pushElemTemplateElement.
 Performance critical.<DD><DL>
<DT><B>Returns:</B><DD>Node at the top of the stack or null if stack is empty.</DL>
</DD>
</DL>
<HR>

<A NAME="pushPair(int, int)"><!-- --></A><H3>
pushPair</H3>
<PRE>
public final void <B>pushPair</B>(int&nbsp;v1,
                           int&nbsp;v2)</PRE>
<DL>
<DD>Push a pair of nodes into the stack.
 Special purpose method for TransformerImpl, pus