[Georg Heiler]

Hi,

I try to use the confluent schema registry in an interactive Flink Scala
shell.

My problem is trying to initialize the serializer from the
ConfluentRegistryAvroDeserializationSchema fails:

```scala
val serializer =
ConfluentRegistryAvroDeserializationSchema.forSpecific[Tweet](classOf[Tweet],
schemaRegistryUrl)
error: type arguments [Tweet] conform to the bounds of none of the
overloaded alternatives of
value forSpecific: [T <: org.apache.avro.specific.SpecificRecord](x$1:
Class[T], x$2: String, x$3:
Int)org.apache.flink.formats.avro.registry.confluent.ConfluentRegistryAvroDeserializationSchema[T]
<and> [T <: org.apache.avro.specific.SpecificRecord](x$1: Class[T],
x$2: 
String)org.apache.flink.formats.avro.registry.confluent.ConfluentRegistryAvroDeserializationSchema[T]
```

please see
https://stackoverflow.com/questions/62637009/flink-use-confluent-schema-registry-for-avro-serde
for details how the shell was set up and which additional JARs were loaded

Best,
Georg