From eaa7f17ee45e3549808540b573dcdd375a5e270a Mon Sep 17 00:00:00 2001
From: Michael Chisholm <chisholm@mitre.org>
Date: Thu, 4 Jun 2020 18:03:15 -0400
Subject: [PATCH] Fix versionability detection: _properties is an OrderedDict
 not a list of tuples! (despite what it looks like if you glance at it
 quickly.)

---
 stix2/versioning.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/stix2/versioning.py b/stix2/versioning.py
index 33b1c59..ca0a495 100644
--- a/stix2/versioning.py
+++ b/stix2/versioning.py
@@ -117,7 +117,7 @@ def _is_versionable(data):
                 # but do check SCOs
                 cls = class_maps["observables"][obj_type]
                 is_versionable = _VERSIONING_PROPERTIES.issubset(
-                    p[0] for p in cls._properties
+                    cls._properties
                 )
 
     return is_versionable, is_21