code: public final void pushExpressionState(int cn, int en, PrefixResolver nc)
    {
      m_currentNodes.push(cn);
      m_currentExpressionNodes.push(cn);
      m_prefixResolvers.push(nc);
    }
docs: Push the current context node, expression node, and prefix resolver.
  
  @param cn the <a href="http://www.w3.org/TR/xslt#dt-current-node">current node</a>.
  @param en the sub-expression context node.
  @param nc the namespace context (prefix resolver.