@Override
    public void close() {
        for (TransformationStage<R> transformationStage : transformationStages) {
            transformationStage.close();
        }
    }
Represents a chain of {@link Transformation}s to be applied to a {@link ConnectRecord} serially.
@param <T> The type of record included in the {@link ProcessingContext} associated with each record
@param <R> The type of record (must be an implementation of {@link ConnectRecord})
connect/runtime/src/main/java/org/apache/kafka/connect/runtime/TransformationChain.java