{% if group.creator == user or user.username in group.editors %}
{% for set in group.sets.all %}
{{ set.name }} {% if set.creator == user or user.username in set.editors %}{% endif %}
{% endfor %}
{% else %}
{% for set in group.available_sets %}
{{ set.name }}
{% endfor %}
{% endif %}
{% if group.creator == user or user.username in group.editors %}