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* In ``SystemWideEnterpriseUserRoleAssignment``, Use either ``applies_to_all_contexts`` or ``enterprise_customer``
if they are True or non-null, respectively, in determining the result of ``get_context()``,
but continue to return list of all linked enterprise customer UUIDs if not, (which is the current behavior).
This is a small step on our journey to explicitly defining user-role assignments.