using-global-values-in-email.twig

{# in my_email_template.html #}

{# Notice use_header_logo={{use_header_logo}} in the module_block. #}
{# This is how the value is passed into the module. #}

{# It's important to explicitly check for false since the value can be null #}
{# When the client has not changed the boolean switches in 'Module Usage' #}
{# This is based on the assumption that the module is enabled by default. #}
<table>                                             
  <tr>
    <td>
      {% if module_usage.header == false %}
        <!--[if !mso]><!-- -->
        {% set use_header_logo = false %}
      {% endif %}
      <div class="widget-span widget-type-custom_widget">
        <div class="layout-widget-wrapper">
          {% if  module_usage.header == null %}
            {# it was null, setting use_header_logo to true.. #}
            {% set use_header_logo = true %}
          {% elif module_usage.header == true %}  
            {# it was true, setting use_header_logo to true.. #}
            {% set use_header_logo = true %}
          {% endif %}
          
          {% module_block 
            module "module_1549" 
            module_id="612", 
            overrideable=True, 
            per_widget_wrapper_html='', 
            widget_name='Header', 
            wrapping_html='', 
            label='Header',
            use_header_logo={{use_header_logo}} 
          %}
          {% end_module_block %}
        </div>
        <!--end layout-widget-wrapper -->
      </div>
      {% if module_usage.header == false %}<!--<![endif]-->{% endif %}
      <!--end widget-span -->
    </td>
  </tr>  
</table>