@Override
    public void configure(Map<String, ?> configs) {
        NumberConverterConfig conf = new NumberConverterConfig(configs);
        boolean isKey = conf.type() == ConverterType.KEY;
        serializer.configure(configs, isKey);
        deserializer.configure(configs, isKey);

    }
Create the converter.

@param typeName the displayable name of the type; may not be null
@param schema the optional schema to be used for all deserialized forms; may not be null
@param serializer the serializer; may not be null
@param deserializer the deserializer; may not be null
connect/runtime/src/main/java/org/apache/kafka/connect/converters/NumberConverter.java