@Override
    public String toString() {
        return this.value;
    }
Specify whether your DRM encryption key is static or from a key provider that follows the SPEKE standard. For more
information about SPEKE, see https://docs.aws.amazon.com/speke/latest/documentation/what-is-speke.html.
aws-java-sdk-mediaconvert/src/main/java/com/amazonaws/services/mediaconvert/model/CmafKeyProviderType.java