`args String a, String b
The outer most content is cached for 20 seconds, using the CacheFor annotation. ${new Date()}
this part is never cached.
`invoke controllers.more.Portlets.panel1(a)this part is cached for 10 seconds. Note the timeout spec with invoke overrides CacheFor annotation.
`a controllers.more.Portlets.panel2(b), "10s"this part is cached for 4 seconds, specified with CacheFor annotation in the controller.
`a controllers.more.Portlets.panel3(a + b)