public @Nullable Scriptable jsFunction_firstHeader(String name) {
		Header h = req.getFirstHeader(name);
		return h == null ? null : makeJsHeader(Context.getCurrentContext(), h);
	}
public @ Nullable Scriptable jsFunction_firstHeader ( String name ) { Header h = req . getFirstHeader ( name ) ; return h == null ? null : makeJsHeader ( Context . getCurrentContext ( ) , h ) ; }
null or {name:..., value:...}