@
safe static if(!(is(Handler : HTTPServerRequestDelegate) || is(Handler : HTTPServerRequestFunction) || is(Handler : HTTPServerRequestHandler) || is(Handler : HTTPServerRequestDelegateS) || is(Handler : HTTPServerRequestFunctionS) || is(Handler : HTTPServerRequestHandlerS)))
static if(is(Handler : USDel) || is(Handler : USFun) || is(Handler : USDelS) || is(Handler : USFunS))