public void setKmsKeyArn(String kmsKeyArn) {
        this.kmsKeyArn = kmsKeyArn;
    }
<p>
The KMS key required to decrypt the contents of the grammar, if any.
</p>

@param kmsKeyArn
       The KMS key required to decrypt the contents of the grammar, if any.
aws-java-sdk-lexmodelsv2/src/main/java/com/amazonaws/services/lexmodelsv2/model/GrammarSlotTypeSource.java