void getConfig_returnsConfig() {
        SmbTreeConnection c = newConn();
        assertSame(config, c.getConfig());
    }

    @Test
    @DisplayName("acquire calls tree.acquire on first usage, release calls tree.release at zero")
    void acquire_release_lifecycle() {
        SmbTreeConnection c = newConn();
        SmbTreeImpl tree = mock(SmbTreeImpl.class);

pkg net/smtp, type ServerInfo struct, TLS bool
pkg net/textproto, func CanonicalMIMEHeaderKey(string) string
pkg net/textproto, func Dial(string, string) (*Conn, error)
pkg net/textproto, func NewConn(io.ReadWriteCloser) *Conn
pkg net/textproto, func NewReader(*bufio.Reader) *Reader
pkg net/textproto, func NewWriter(*bufio.Writer) *Writer
pkg net/textproto, method (*Conn) Close() error