Clearkey/Widevine/Playready

Its Roku supported Clearkey?

Im already check at https://developer.roku.com/en-gb/docs/specs/media/content-protection.md but nothing mention about Clearkey. If Roku supported Clearkey, give some example to implement it like Widevine below:

Required Roku channel manifest entries:

requires_widevine_drm=1
requires_widevine_version=1.0

Configure DRM parameters in an roAssociativeArray:

drmParams = {
keySystem: "Widevine"
licenseServerURL: "<http(s)://license-server-host/path?param=value>"
}

Setup ContentNode and set to Video node:

contentNode = createObject("roSGNode", "contentNode")
contentNode.streamFormat = "dash"
contentNode.url = "wwww.myvideo.com/content.mpd"
contentNode.drmParams = drmParams

m.video.content = contentNode