releaseLabel property
The Amazon EMR release label, which determines the version of open-source
application packages installed on the cluster. Release labels are in the
form emr-x.x.x, where x.x.x is an Amazon EMR release version
such as emr-5.14.0. For more information about Amazon EMR
release versions and included application versions and features, see https://docs.aws.amazon.com/emr/latest/ReleaseGuide/.
The release label applies only to Amazon EMR releases version 4.0 and later.
Earlier versions use AmiVersion.
Implementation
final String? releaseLabel;