有没有一种方法可以在Liquid中删除多维数组中的重复项

{% assign array = "1,2,2,3,4,4,5,5,5,6" | split: "," %}
{% assign unique_array = "" | split: "" %}

{% for item in array %}
  {% unless unique_array contains item %}
    {% assign unique_array = unique_array | push: item %}
  {% endunless %}
{% endfor %}

{{ unique_array | join: ", " }}

{% assign multi_array = "1,2,2,3,4,4,5,5,5,6,7,8,8,9" | split: "," | map: "split: ','" %}

{% assign unique_multi_array = [] %}

{% for sub_array in multi_array %}
  {% assign unique_sub_array = [] %}
  {% for item in sub_array %}
    {% unless unique_sub_array contains item %}
      {% assign unique_sub_array = unique_sub_array | push: item %}
    {% endunless %}
  {% endfor %}
  {% assign unique_multi_array = unique_multi_array | push: unique_sub_array %}
{% endfor %}

{{ unique_multi_array | jsonify }}