public void setVerificationCertificate(String verificationCertificate) {
        this.verificationCertificate = verificationCertificate;
    }
<p>
The private key verification certificate. If <code>certificateMode</code> is <code>SNI_ONLY</code>, the
<code>verificationCertificate</code> field must be empty. If <code>certificateMode</code> is <code>DEFAULT</code>
or not provided, the <code>verificationCertificate</code> field must not be empty.
</p>

@param verificationCertificate
       The private key verification certificate. If <code>certificateMode</code> is <code>SNI_ONLY</code>, the
       <code>verificationCertificate</code> field must be empty. If <code>certificateMode</code> is
       <code>DEFAULT</code> or not provided, the <code>verificationCertificate</code> field must not be empty.
aws-java-sdk-iot/src/main/java/com/amazonaws/services/iot/model/RegisterCACertificateRequest.java