code: @Override
  	public void setVerbose(@Nullable PrintStream out, int level) {
  		super.setVerbose(out, level);
  		if( level > 0 )
  			this.parameterUpdate.setVerbose(verbose,level);
  	}
docs: Turns on printing of debug messages.
  @param out Stream that is printed to. Set to null to disable
  @param level 0=Debug from solver. {@code > 0} is debug from solver and update