public void setSignKey(String signKey) {
        this.signKey = signKey;
    }
<p>
Asymmetric KMS key from Key Management Service. The KMS key must have a key usage of sign and verify, and support
the RSASSA-PSS SHA-256 signing algorithm.
</p>

@param signKey
       Asymmetric KMS key from Key Management Service. The KMS key must have a key usage of sign and verify, and
       support the RSASSA-PSS SHA-256 signing algorithm.
aws-java-sdk-licensemanager/src/main/java/com/amazonaws/services/licensemanager/model/IssuerDetails.java