One Thing You Need To Do Before Calling apex_web_service.make_rest_request

Can you spot the bug in the following code? (Hint: it compiles and no run-time errors) -- ... l_json := apex_web_service.make_rest_request( p_url => 'http://someurl.com/data', p_http_method => 'GET' ); -- ... It's not so obvious until I expose t...