Added check for out set

colorbleed/plugins/maya/publish/validate_animation_content.py

@@ -20,6 +20,12 @@ class ValidateAnimationContent(pyblish.api.InstancePlugin):
     def get_invalid(cls, instance):
         assert 'out_hierarchy' in instance.data, "Missing `out_hierarchy` data"
 
+        out_set = next((i for i in instance.data["setMembers"] if
+                        i.endswith("out_SET")), None)
+
+        assert out_set, ("Instance '%s' has no objectSet named: `OUT_set`" %
+                         instance.name)
+
         # All nodes in the `out_hierarchy` must be among the nodes that are
         # in the instance. The nodes in the instance are found from the top
         # group, as such this tests whether all nodes are under that top group.