public ModifyDBInstanceRequest withPerformanceInsightsKMSKeyId(String performanceInsightsKMSKeyId) {
        setPerformanceInsightsKMSKeyId(performanceInsightsKMSKeyId);
        return this;
    }
<p>
The KMS key identifier for encryption of Performance Insights data.
</p>
<p>
The KMS key identifier is the key ARN, key ID, alias ARN, or alias name for the KMS key.
</p>
<p>
If you do not specify a value for PerformanceInsightsKMSKeyId, then Amazon DocumentDB uses your default KMS key.
There is a default KMS key for your Amazon Web Services account. Your Amazon Web Services account has a different
default KMS key for each Amazon Web Services region.
</p>

@param performanceInsightsKMSKeyId
       The KMS key identifier for encryption of Performance Insights data.</p>
       <p>
       The KMS key identifier is the key ARN, key ID, alias ARN, or alias name for the KMS key.
       </p>
       <p>
       If you do not specify a value for PerformanceInsightsKMSKeyId, then Amazon DocumentDB uses your default
       KMS key. There is a default KMS key for your Amazon Web Services account. Your Amazon Web Services account
       has a different default KMS key for each Amazon Web Services region.
@return Returns a reference to this object so that method calls can be chained together.
aws-java-sdk-docdb/src/main/java/com/amazonaws/services/docdb/model/ModifyDBInstanceRequest.java