public Builder retrier(Retrier.Builder retrierBuilder) {
            this.retriers.add(retrierBuilder);
            return this;
        }
OPTIONAL. Adds the {@link Retrier} to this states retries. If a single branch fails then the entire map state is
considered failed and eligible for retry.

@param retrierBuilder Instance of {@link Retrier.Builder}. Note
                      that the {@link
                      Retrier} object is not built until the {@link MapState} is built so any modifications on
                      the
                      state builder will be reflected in this object.
@return This object for method chaining.
aws-java-sdk-stepfunctions/src/main/java/com/amazonaws/services/stepfunctions/builder/states/MapState.java