{
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          },
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        "__compat": {
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            },
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            },
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            },
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              "version_added": null
            },
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            },
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              "version_added": null
            },
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          }
        }
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            },
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            },
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            },
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          "mdn_url": "https://developer.mozilla.org/docs/Web/API/SyncEvent/tag",
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            },
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            },
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              "version_added": null
            },
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}