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-rw-r--r--frontend/containers.dcl6
1 files changed, 6 insertions, 0 deletions
diff --git a/frontend/containers.dcl b/frontend/containers.dcl
index abb6752..e788c86 100644
--- a/frontend/containers.dcl
+++ b/frontend/containers.dcl
@@ -1,7 +1,13 @@
definition module containers
+/*2.0
+from syntax import ::Optional
+from StdOverloaded import class toString
+0.2*/
+//1.3
from syntax import Optional
from StdOverloaded import toString
+//3.1
:: NumberSet = Numbers !Int !NumberSet | EndNumbers