code: public String getValueAsString(Expression expr) throws PageException {
  	expr.writeOut(this, Expression.MODE_REF);
  	return Caster.toString(stack.pop());
      }
docs: removes the element from top of the stack
  
  @return
  
  public String stackPopBottomAsString() { // TODO Auto-generated method stub return null;
  } public boolean stackPopBottomAsBoolean() { // TODO Auto-generated method stub return
  false; }