-special Foo
- attr _a3: Integer#!alt1# #!alt2#
- #alt1#attr _a3: Integer = new Integer(9000)
- #alt2#attr _a3: nullable Integer
- redef meth run
+ super Foo
+ var a3: Integer is noinit#alt1# #alt2#
+ #alt1#var a3: Integer = new Integer(9000)
+ #alt2#var a3: nullable Integer is noinit
+ redef fun run