def inject_field_overrides(blocks, course, user):
 OverrideFieldData.provider_classes = None
 for block in blocks:
  block._field_data = OverrideFieldData.wrap(user, course, block._field_data)

def inject_field_overrides ( blocks , course , user ) : OverrideFieldData . provider_classes = None for block in blocks : block . _field_data = OverrideFieldData . wrap ( user , course , block . _field_data )
apparently the test harness doesnt use lmsfieldstorage .