@UnstableApi
    public ServerBuilder tlsEngineType(TlsEngineType tlsEngineType) {
        virtualHostTemplate.tlsEngineType(tlsEngineType);
        return this;
    }
Sets {@link TlsEngineType} that will be used for processing TLS connections.

@param tlsEngineType the {@link TlsEngineType} to use
core/src/main/java/com/linecorp/armeria/server/ServerBuilder.java