public String getKmsKeyId() {
        return this.kmsKeyId;
    }
<p>
Specifies the ID of the Key Management Service (KMS) key to use for encrypting data on an Amazon File Cache. If a
<code>KmsKeyId</code> isn't specified, the Amazon FSx-managed KMS key for your account is used. For more
information, see <a href="https://docs.aws.amazon.com/kms/latest/APIReference/API_Encrypt.html">Encrypt</a> in
the <i>Key Management Service API Reference</i>.
</p>

@return Specifies the ID of the Key Management Service (KMS) key to use for encrypting data on an Amazon File
        Cache. If a <code>KmsKeyId</code> isn't specified, the Amazon FSx-managed KMS key for your account is
        used. For more information, see <a
        href="https://docs.aws.amazon.com/kms/latest/APIReference/API_Encrypt.html">Encrypt</a> in the <i>Key
        Management Service API Reference</i>.
aws-java-sdk-fsx/src/main/java/com/amazonaws/services/fsx/model/FileCache.java