code: private static void copyProperties(Schema oldSchema, Schema newSchema) {
      Preconditions.checkNotNull(oldSchema);
      Preconditions.checkNotNull(newSchema);
  
      Map<String, JsonNode> props = oldSchema.getJsonProps();
      copyProperties(props, newSchema);
    }
docs: *
  Copy properties from old Avro Schema to new Avro Schema
  @param oldSchema Old Avro Schema to copy properties from
  @param newSchema New Avro Schema to copy properties to