arent have been set. It also assumes that any
 properties exposed as attributes have been set too. When this method is invoked, the body has not yet been
 evaluated.

 <p>
 This method returns Tag.EVAL_BODY_INCLUDE or BodyTag.EVAL_BODY_BUFFERED to indicate that the body of the action
 should be evaluated or SKIP_BODY to indicate otherwise.

 <p>
 When a Tag returns EVAL_BODY_INCLUDE the result of evaluating the body (if any) is included into the current
 "out" JspWriter as it happens and then doEndTag() is 