public EcsClusterDetails withRegisteredContainerInstancesCount(Integer registeredContainerInstancesCount) {
        setRegisteredContainerInstancesCount(registeredContainerInstancesCount);
        return this;
    }
<p>
The number of container instances registered into the cluster.
</p>

@param registeredContainerInstancesCount
       The number of container instances registered into the cluster.
@return Returns a reference to this object so that method calls can be chained together.
aws-java-sdk-guardduty/src/main/java/com/amazonaws/services/guardduty/model/EcsClusterDetails.java