public void setRegionList(java.util.Collection<String> regionList) {
        if (regionList == null) {
            this.regionList = null;
            return;
        }

        this.regionList = new java.util.ArrayList<String>(regionList);
    }
<p>
The <code>regionList</code> can contain up to six Amazon Web Services Regions where the keyspace is replicated
in.
</p>

@param regionList
       The <code>regionList</code> can contain up to six Amazon Web Services Regions where the keyspace is
       replicated in.
aws-java-sdk-keyspaces/src/main/java/com/amazonaws/services/keyspaces/model/ReplicationSpecification.java