
PASS The detail property in the mark constructor should be structured-clone.
PASS The detail property in the mark method should be structured-clone.
PASS When accessing detail from a mark entry and the detail is not provided, just return a null value.
PASS Mark: Throw an exception when the detail property cannot be structured-serialized.
PASS The detail property in the measure method should be structured-clone.
PASS The detail property in the measure method should be the same reference.
PASS When accessing detail from a measure entry and the detail is not provided, just return a null value.
PASS Measure: Throw an exception when the detail property cannot be structured-serialized.
PASS The detail object is cloned when passed to mark API.