| {static:} modifier* '{' '}' ';'
| ';';
-implements_declaration = 'implements' interface_list*;
-extends_declaration = 'extends' type;
+implements_declaration = 'implements' interface_list;
+extends_declaration = 'extends' interface_list;
interface_list
= {tail:} interface_list ',' full_class_name
| {head:} full_class_name;