VOL-2496 Add "event listen" command to voltctl

Change-Id: I8f1fb34b55f56c8125142ac289e2f19fc170d804
diff --git a/pkg/model/utils.go b/pkg/model/utils.go
index d30324f..15ef51f 100644
--- a/pkg/model/utils.go
+++ b/pkg/model/utils.go
@@ -28,3 +28,11 @@
 	eValue := msg.FindFieldDescriptorByName(name).GetEnumType().FindValueByName(value)
 	msg.SetFieldByName(name, eValue.GetNumber())
 }
+
+func GetEnumString(msg *dynamic.Message, name string, value int32) string {
+	eValue := msg.FindFieldDescriptorByName(name).GetEnumType().FindValueByNumber(value)
+	if eValue == nil {
+		panic("eValue is nil")
+	}
+	return eValue.GetName()
+}