Description:
------------
As of PHP 7.0, grouping items when important from namespaces became allowed, however this seems to be only when everything is from one namespace, and precludes allowing the shortened format if pulling multiple items from multiple namespaces. It is unclear if this was intended behavior, or if this is a bug. If this was intended, please change to request for this proposed functionality.

Test script:
---------------
namespace Foo;
class f1{}
class f2{}

namespace Bar;
class b1{}
class b2{}

namespace main;
use Foo\{f1,f2}, Bar\{b1,b2};

>> PHP Parse error: Syntax error, unexpected ',', expecting ';' on line 1