views/macros/column_classes.html.twig
{% macro column_classes(sizes) %}
{% if sizes is iterable %}
{% for size in sizes %}
{% if size.mobile %}column column-xs-{{ size.mobile }}{% endif %}
{% if size.tablet %}column column-sm-{{ size.tablet }}{% endif %}
{% if size.medium %}column column-md-{{ size.medium }}{% endif %}
{% if size.large %}column column-lg-{{ size.large }}{% endif %}
{% endfor %}
{% endif %}
{% endmacro %}