public String sessionId() {
        return sessionId;
    }
Fills the Servlet TLS attributes from {@link SSLSession} into {@code ServletRequest}.

@param session the {@link SSLSession} of the current connection.
@param setter the setter that will be invoked with the Servlet attribute name and value.
core/src/main/java/com/linecorp/armeria/internal/server/servlet/ServletTlsAttributes.java