This is necessary for bookkeeping when creating new streams. Correct framing requires that stream IDs are sequential on the socket, so we need to bundle assigning the ID with sending the `SYN_STREAM` frame.

## Connection Pool

    }

    /**
     * Sets the level and returns this.
     *
     * This was deprecated in OkHttp 4.0 in favor of the [level] val. In OkHttp 4.3 it is
     * un-deprecated because Java callers can't chain when assigning Kotlin vals. (The getter remains
     * deprecated).
     */
    fun setLevel(level: Level) =
      apply {
        this.level = level
      }

    @JvmName("-deprecated_level")
    @Deprecated(

	// providing the ability to have sub-second resolution for timestamps.
	//
	// Some newer formats add their own extensions to PAX by defining their
	// own keys and assigning certain semantic meaning to the associated values.
	// For example, sparse file support in PAX is implemented using keys
	// defined by the GNU manual (e.g., "GNU.sparse.map").
	//
	// Reference:

    this because it only occurs if you have proxy configured and you share a connection pool among
    multiple `OkHttpClient` instances.

    This particularly-subtle bug was caused by us assigning each `OkHttpClient` instance its own
    `NullProxySelector` when an explicit proxy is configured. But we don't share connections when
    the proxy selectors are different. Ugh!


## Version 4.2.0

// Eager Executor APIs.
typedef struct TFE_Executor TFE_Executor;

// Creates a new eager Executor. Nodes in one executor are guaranteed to be
// executed in sequence. Assigning nodes to different executors allows executing
// nodes in parallel.
// in_flight_nodes_limit: when is_async is true, this value controls the
// maximum number of in flight async nodes. Enqueuing of additional async ops

</li>

<li>
In all other cases, <code>x.f</code> is illegal.
</li>

<li>
If <code>x</code> is of pointer type and has the value
<code>nil</code> and <code>x.f</code> denotes a struct field,
assigning to or evaluating <code>x.f</code>
causes a <a href="#Run_time_panics">run-time panic</a>.
</li>

<li>
If <code>x</code> is of interface type and has the value
<code>nil</code>, <a href="#Calls">calling</a> or

    /**
     * @param tc
     *            context to use
     * @param auth
     *            credentials
     * @param doSigning
     *            whether signing is requested
     */
    public NtlmContext ( CIFSContext tc, NtlmPasswordAuthenticator auth, boolean doSigning ) {
        this.transportContext = tc;
        this.auth = auth;

     * @param trans
     * @param tdomain
     * @param negoResp
     * @param ctx
     * @param doSigning
     * @param s
     * @return
     * @throws SmbException
     */
    protected SSPContext createContext ( SmbTransportImpl trans, final String tdomain, final Smb2NegotiateResponse negoResp, final boolean doSigning,
            Subject s ) throws SmbException {

        String host = getTargetHost();

     */
    @Override
    public SSPContext createContext ( CIFSContext tc, String targetDomain, String host, byte[] initialToken, boolean doSigning ) throws SmbException {
        if ( tc.getConfig().isUseRawNTLM() ) {
            return setupTargetName(tc, host, new NtlmContext(tc, this, doSigning));
        }

        try {
            if ( initialToken != null && initialToken.length > 0 ) {

                    case 20:
                        if (nctx == null) {
                            boolean doSigning = (transport.flags2 & ServerMessageBlock.FLAGS2_SECURITY_SIGNATURES) != 0;
                            nctx = new NtlmContext(auth, doSigning);
                        }
    
                        if (SmbTransport.log.level >= 4)
                            SmbTransport.log.println(nctx);