It compiles fine, but does not work.
The problem comes from the test:
<c:when test="row.method == 'test'}" >
is not correct, neither is:
<c:when test="foobar.method == 'test'" > (which actually even crash when ran)
Playing with the id of the display:table does not seem to change a thing.
It is probably very simple but the last hour I spent in google did not help me...