Frozen
data class FrozenLedgerKeysDeltaXdr(val keysToFreeze: List<EncodedLedgerKeyXdr>, val keysToUnfreeze: List<EncodedLedgerKeyXdr>)
XDR Source: struct FrozenLedgerKeysDelta { EncodedLedgerKey keysToFreeze<>; EncodedLedgerKey keysToUnfreeze<>; };