public UpdatePublicKeyRequest withIfMatch(String ifMatch) {
        setIfMatch(ifMatch);
        return this;
    }
<p>
The value of the <code>ETag</code> header that you received when retrieving the public key to update. For
example: <code>E2QWRUHAPOMQZL</code>.
</p>

@param ifMatch
       The value of the <code>ETag</code> header that you received when retrieving the public key to update. For
       example: <code>E2QWRUHAPOMQZL</code>.
@return Returns a reference to this object so that method calls can be chained together.
aws-java-sdk-cloudfront/src/main/java/com/amazonaws/services/cloudfront/model/UpdatePublicKeyRequest.java