Non resolved typography/boxshadow tokens are not exported correctly.

[swordEdge]

CDescribe the bug
When trying to expand and export a typography / boxshadow token which has non resolved value, plugin export strange value.

To Reproduce

1. Create a typography / boxshadow token in alias mode and value must be non resolved value.
2. Click export button
3. Check expand typography / boxshadow property.
4. Check the preview

Expected behavior
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