public Boolean getCritical() {
        return this.critical;
    }
<p/>
<p>
Specifies the critical flag of the X.509 extension.
</p>

@return <p>
        Specifies the critical flag of the X.509 extension.
aws-java-sdk-acmpca/src/main/java/com/amazonaws/services/acmpca/model/CustomExtension.java