NewMutableTransformer creates a transformer that can be updated at any time by calling Set().

NewPrefixTransformers supports the Transformer interface by checking the incoming data against the provided prefixes in order.

RecordCacheMiss records a miss on Key Encryption Key(KEK) - call to KMS was required to decrypt KEK.

RecordDataKeyGeneration records latencies and count of Data Encryption Key generation operations.

RecordTransformation records latencies and count of TransformFromStorage and TransformToStorage operations.

IdentityTransformer performs no transformation of the provided data.

MutableTransformer allows a transformer to be changed safely at runtime.

PrefixTransformer holds a transformer interface and the prefix that the transformation is located under.

Context is additional information that a storage transformation may need to verify the data at rest.

Transformer allows a value to be transformed before being read from or written to the underlying store.

DefaultContext is a simple implementation of Context for a slice of bytes.