fun <S : SAdSlot<S>> S.copy(adTag: String = this.adTag, extra: Any = this.extra, opener: String? = this.opener, forceOpener: Boolean = this.forceOpener, closer: String? = this.closer, forceCloser: Boolean = this.forceCloser, bumper: String? = this.bumper, forceBumper: Boolean = this.forceBumper, envVars: SxEnvironmentVariables = this.envVars, skipAdDuration: Int = this.skipAdDuration): S