@contentauth/c2pa-js
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    Role:
        | "c2pa.areaOfInterest"
        | "c2pa.cropped"
        | "c2pa.edited"
        | "c2pa.placed"
        | "c2pa.redacted"
        | "c2pa.subjectArea"
        | "c2pa.deleted"
        | "c2pa.styled"
        | "c2pa.watermarked"

    A role describing the region.