Hi,
The main part of our project is a List View. three columns are normal columns, other three columns are extending columns. We writed an opa5 test for our project. The six columns share the same OData, The normal columns works, but the extending columns doesn't show properly. See snapshot below.

We don't know what are missing in the mock. Compare with other project, we suppose it maybe related to "leadingProperty" entry in the CustomData of column defination.
We also searched the site https://sapui5.hana.ondemand.com/, there are opa5 testing which contains "leadingProperty".
What are missing in the opa5 tesing? Please give us some advices. Thank you in advance.
Best Regards
Wanhua