web/src/main/java/org/springframework/security/web/server/header/StrictTransportSecurityServerHttpHeadersWriter.java
@Override
	public Mono<Void> writeHttpHeaders(ServerWebExchange exchange) {
		return isSecure(exchange) ? delegate.writeHttpHeaders(exchange) : Mono.empty();
	}
@Override
	public Mono<Void> writeHttpHeaders(ServerWebExchange exchange) {
		return isSecure(exchange) ? delegate.writeHttpHeaders(exchange) : Mono.empty();
	}
/* (non-Javadoc)
@see org.springframework.security.web.server.HttpHeadersWriter#writeHttpHeaders(org.springframework.http.HttpHeaders)