Does HttpUrlConnection censor some headers, notably Origin?

I found https://github.com/AdoptOpenJDK/openjdk-jdk8u/blob/master/jdk/src/share/classes/sun/net/www/protocol/http/HttpURLConnection.java#L189

The author, cleverly, decided to forbid Origin and other CORS-related headers without actually implementing the CORS spec. It's pretty depressing.