copy method

@override Future<void> copy(String sourceKey, String destKey)

Copy an object, including its metadata.

Local: filesystem-level copy. Encrypted: re-encrypts when the destination resolves to a different encryption key. Remote: server- side CopyObject. The metadata travels with the body.

Implementation

@override
Future<void> copy(String sourceKey, String destKey) =>
    throw UnsupportedError('stub');