Tink has some nice things, like AEAD as a standard interface or the KetSet concept to bundle all the crypto info in one object. But its key management is cumbe

Tink has some nice things, like AEAD as a standard interface or the KetSet concept to bundle all the crypto info in one object. But its key management is cumbersome and restrictive. Dealing with keys seems like a headache. Looking at the doc and browsing the code a bit, I don't see how to do key derivation. Is there a way to do simple key derivation via pbkdf2, scrypt or the variants?