{% block placeholder-messages %}{% block messages %}{% endblock %}{% endblock %}
{% block placeholder-page-header %}{% block page-header %}{% endblock %}{% endblock %}
{% block placeholder-columns-top %}{% block columns-top %}{% endblock %}{% endblock %}
{% block placeholder-content %}{% block content %}{% endblock %}{% endblock %}
{% block placeholder-columns-bottom %}{% block columns-bottom %}{% endblock %}{% endblock %}