workaround

Main.hx

package;
import tink.lang.Cls;
class Foo<T> {
    public var owner:T;
    public function new() {
    }
}
class Param {
}
class Main<T> implements Cls {
    @:forward public var foo:Foo<T>;
    @:prop(foo.owner, foo.owner = param) var owner:T;
    public function new() {
    }
    public static function main():Void {
        var main = new Main<Param>();
    }
}