public InstanceGroup withConfigurationsVersion(Long configurationsVersion) {
        setConfigurationsVersion(configurationsVersion);
        return this;
    }
<p>
The version number of the requested configuration specification for this instance group.
</p>

@param configurationsVersion
       The version number of the requested configuration specification for this instance group.
@return Returns a reference to this object so that method calls can be chained together.
aws-java-sdk-emr/src/main/java/com/amazonaws/services/elasticmapreduce/model/InstanceGroup.java