code: public BodyContent push() {
  	if (current.after == null) {
  	    current.after = new Entry(current, new BodyContentImpl(current.body == null ? (JspWriter) base : current.body));
  	}
  	else {
  	    current.after.doDevNull = false;
  	    current.after.body.init(current.body == null ? (JspWriter) base : current.body);
  	}
  	current = current.after;
  	return current.body;
      }
docs: push a new BodyContent to Stack
  
  @return new BodyContent