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我想在主题包含特定文本时为其添加标签。有没有办法将 {{ $JSON.topic.title }} 转换为小写,以便该条件在 “pub run”、“Pub Run” 或 “pUb rUn” 的情况下都返回 true?

(节选)

{
      "id": "db9e2fa2-0008-4110-9c77-f1060124d7e7",
      "type": "condition:if",
      "typeVersion": "1.0",
      "name": "If",
      "parameters": {
        "combinator": "and",
        "conditions": [
          {
            "id": "29d3ed6c-e984-4d9b-83bf-861bd11b4b0a",
            "operator": {
              "type": "string",
              "operation": "contains",
              "singleValue": false
            },
            "leftValue": "={{ $json.topic.title }}",
            "rightValue": "pub run"
          }
        ]
      },