public String getPlacementStrategy() {
        return this.placementStrategy;
    }
<p>
Amazon EC2 Placement Group strategy associated with instance role.
</p>
<p>
Starting with Amazon EMR release 5.23.0, the only supported placement strategy is <code>SPREAD</code> for the
<code>MASTER</code> instance role.
</p>

@return Amazon EC2 Placement Group strategy associated with instance role.</p>
        <p>
        Starting with Amazon EMR release 5.23.0, the only supported placement strategy is <code>SPREAD</code> for
        the <code>MASTER</code> instance role.
@see PlacementGroupStrategy
aws-java-sdk-emr/src/main/java/com/amazonaws/services/elasticmapreduce/model/PlacementGroupConfig.java