{% set required_options = ['name','verbose_name','app_label'] %}

{% for m in proto.messages %}
{% for o in required_options %}
{% if not options[o] and not m.options[o] %}
504 Required option {{ o }} is missing from model {{ m.name }}
{% endif %}

{% set required_field_options = ['tosca_key'] %}

{% endfor %}
{% endfor %}