Merge pull request #182 from masqu3rad3/hotfix

Adding usd_lop into the HDA callbacks for future proofing the lop_imort HDA

tik_manager4/dcc/houdini/hda/nodes/callbacks.py

@@ -359,7 +359,7 @@ def populate_elements(self, node, version_obj=None):
                 object.
         """
         if version_obj:
-            valid_elements = ["alembic", "usd"]
+            valid_elements = ["alembic", "usd", "usd_lop"]
             elements = [x for x in version_obj.element_types if x in valid_elements]
             element_names = ";".join(elements)
             pass_value = elements[0] if elements else None