Fires once for every part returned when listing a multipart upload's parts.
The 'callback' is called when the 'PartList' event is emited.
The argument 'e' has the following properties:
e.partNumber e.objectName e.lastModified e.size e.ETag e.ownerId e.ownerName
This event fires once for each multipart upload part returned when ListParts is called.
PartNumber reflects the part's number.
ObjectName reflects the name of the object the multipart upload is for.
LastModified reflects the last modified time of the part.
Size reflects the size, in bytes, of the part.
ETag reflects the part's ETag of the part.
OwnerId and OwnerName reflect the Id and display name of the part's owner, respectively.
Note: This event is not applicable when ServiceProvider is spGoogleStorage (2); Google Cloud Storage does not support multipart uploads.