SslContext sslContext() {
            return sslContext;
        }
Returns an {@link SslContext} for the specified {@link SslContextMode} and {@link TlsKeyPair}.
Note that the returned {@link SslContext} should be released via
{@link ReferenceCountUtil#release(Object)} when it is no longer used.
core/src/main/java/com/linecorp/armeria/internal/common/SslContextFactory.java