{%- set classes = classes|default([]) -%}
{%- if modifier_class %}{% set classes = classes|merge([modifier_class]) %}{% endif -%}
<a href="#" class="btnIcon {{ ' ' ~ classes|join(' ') }} mr1">
    <svg height="16" width="16"><use xlink:href="#symbol-mail"></use></svg>
    <span class="mask">Call to action</span>
</a>
<button class="btnIcon {{ ' ' ~ classes|join(' ') }} mr1" type="button">
    <svg height="16" width="16"><use xlink:href="#symbol-mail"></use></svg>
    <span class="mask">Button</span>
</button>
<button class="btnIcon {{ ' ' ~ classes|join(' ') }}" disabled type="button">
    <svg height="16" width="16"><use xlink:href="#symbol-mail"></use></svg>
    <span class="mask">Button (disabled)</span>
</button>