{%- if include.overwrite == nil -%}
  {%- if include.global == nil -%}
    {%- assign __return = include.default -%}
  {%- else -%}
    {%- assign __return = include.global -%}
  {%- endif -%}
{%- else -%}
  {%- assign __return = include.overwrite -%}
{%- endif -%}