public Builder maxConcurrency(Integer maxConcurrency) {
            this.maxConcurrency = maxConcurrency;
            return this;
        }
OPTIONAL. Max Concurrency provides an upper bound on how many invocations of the Iterator may run in parallel

@param maxConcurrency New comment.
@return This object for method chaining.
aws-java-sdk-stepfunctions/src/main/java/com/amazonaws/services/stepfunctions/builder/states/MapState.java