public String getSnapshotClusterIdentifier() {
        return this.snapshotClusterIdentifier;
    }
<p>
The identifier of the cluster the snapshot was created from.
</p>
<ul>
<li>
<p>
<i>If the snapshot to access doesn't exist and the associated IAM policy doesn't allow access to all (*)
snapshots</i> - This parameter is required. Otherwise, permissions aren't available to check if the snapshot
exists.
</p>
</li>
<li>
<p>
<i>If the snapshot to access exists</i> - This parameter isn't required. Redshift can retrieve the cluster
identifier and use it to validate snapshot authorization.
</p>
</li>
</ul>

@return The identifier of the cluster the snapshot was created from.</p>
        <ul>
        <li>
        <p>
        <i>If the snapshot to access doesn't exist and the associated IAM policy doesn't allow access to all (*)
        snapshots</i> - This parameter is required. Otherwise, permissions aren't available to check if the
        snapshot exists.
        </p>
        </li>
        <li>
        <p>
        <i>If the snapshot to access exists</i> - This parameter isn't required. Redshift can retrieve the
        cluster identifier and use it to validate snapshot authorization.
        </p>
        </li>
aws-java-sdk-redshift/src/main/java/com/amazonaws/services/redshift/model/AuthorizeSnapshotAccessRequest.java