
Note: the last | is the separator for the tag arguments and the call back parameters. 
It must present even if the parameters are empty.
<p/>
before

<p/>
`tag fooTag("hi") | 
    `final String echo = "secret";

    well ${echo}

	`tag anotherTag(echo) | String what
	    got $what and $echo
		`tag moreTag(echo) | String more
		   got $what and $echo and $more
		`
	`
`
<p/>
after