object Serdes {
  implicit def stringSerde: Serde[String] = ???
  implicit def longSerde: Serde[Long] = ???
  implicit def javaLongSerde: Serde[java.lang.Long] = ???
  implicit def byteArraySerde: Serde[Array[Byte]] = ???
  implicit def bytesSerde: Serde[org.apache.kafka.common.utils.Bytes] = ???
  implicit def byteBufferSerde: Serde[ByteBuffer] = ???
  implicit def shortSerde: Serde[Short] = ???
  implicit def javaShortSerde: Serde[java.lang.Short] = ???
  implicit def floatSerde: Serde[Float] = ???
  implicit def javaFloatSerde: Serde[java.lang.Float] = ???
  implicit def doubleSerde: Serde[Double] = ???
  implicit def javaDoubleSerde: Serde[java.lang.Double] = ???
  implicit def intSerde: Serde[Int] = ???
  implicit def javaIntegerSerde: Serde[java.lang.Integer] = ???
  implicit def uuidSerde: Serde[UUID] = ???

  implicit def timeWindowedSerde[T](implicit tSerde: Serde[T]): WindowedSerdes.TimeWindowedSerde[T] = ???

  implicit def sessionWindowedSerde[T](implicit tSerde: Serde[T]): WindowedSerdes.SessionWindowedSerde[T] = ???

  def fromFn[T >: Null](serializer: T => Array[Byte], deserializer: Array[Byte] => Option[T]): Serde[T] = ???

  def fromFn[T >: Null](serializer: (String, T) => Array[Byte],
    deserializer: (String, Array[Byte]) => Option[T]): Serde[T] = ???
}