public String getKeyId() {
        return this.keyId;
    }
<p>
Identifies the KMS key for the grant. The grant gives principals permission to use this KMS key.
</p>
<p>
Specify the key ID or key ARN of the KMS key. To specify a KMS key in a different Amazon Web Services account,
you must use the key ARN.
</p>
<p>
For example:
</p>
<ul>
<li>
<p>
Key ID: <code>1234abcd-12ab-34cd-56ef-1234567890ab</code>
</p>
</li>
<li>
<p>
Key ARN: <code>arn:aws:kms:us-east-2:111122223333:key/1234abcd-12ab-34cd-56ef-1234567890ab</code>
</p>
</li>
</ul>
<p>
To get the key ID and key ARN for a KMS key, use <a>ListKeys</a> or <a>DescribeKey</a>.
</p>

@return Identifies the KMS key for the grant. The grant gives principals permission to use this KMS key.</p>
        <p>
        Specify the key ID or key ARN of the KMS key. To specify a KMS key in a different Amazon Web Services
        account, you must use the key ARN.
        </p>
        <p>
        For example:
        </p>
        <ul>
        <li>
        <p>
        Key ID: <code>1234abcd-12ab-34cd-56ef-1234567890ab</code>
        </p>
        </li>
        <li>
        <p>
        Key ARN: <code>arn:aws:kms:us-east-2:111122223333:key/1234abcd-12ab-34cd-56ef-1234567890ab</code>
        </p>
        </li>
        </ul>
        <p>
        To get the key ID and key ARN for a KMS key, use <a>ListKeys</a> or <a>DescribeKey</a>.
aws-java-sdk-kms/src/main/java/com/amazonaws/services/kms/model/CreateGrantRequest.java