private static Object convertField(
            DeserializationRuntimeConverter fieldConverter, Object fieldValue, Schema fieldSchema)
            throws Exception {
        if (fieldValue == null) {
            return null;
        } else {
            return fieldConverter.convert(fieldValue, fieldSchema);
        }
    }
Creates a runtime converter which assuming input object is not null.
inlong-sort/sort-flink/sort-flink-v1.15/sort-connectors/sqlserver-cdc/src/main/java/org/apache/inlong/sort/sqlserver/RowDataDebeziumDeserializeSchema.java