}
	}

	// Start separate goroutine for each TCP listener to handle connection.
	for idx, tcpListener := range listener.listeners {
		go handleListener(idx, tcpListener)
	}
}

// Accept - reads from httpListener.acceptCh for one of previously accepted TCP connection and returns the same.
func (listener *httpListener) Accept() (conn net.Conn, err error) {
	select {
	case result, ok := <-listener.acceptCh:
		if ok {

	if err != nil {
		return "", err
	}
	marshalledJSON = append(marshalledJSON, "\n"...)

	return writeCNIConfig(ctx, marshalledJSON, cfg)
}

// writeCNIConfig will
// 1. read in the existing CNI config file
// 2. append the `istio`-specific entry
// 3. write the combined result back out to the same path, overwriting the original.

    echo.
    echo Options:
    echo -jvm-debug [port]  Turn on JVM debugging, open at the given port.  Defaults to 9999 if no port given.
    echo.
    echo Environment variables ^(read from context^):
    echo JAVA_OPTS          Environment variable, if unset uses ""
    echo SBT_OPTS           Environment variable, if unset uses ""
    echo ACTIVATOR_OPTS     Environment variable, if unset uses ""
    echo.

	return &testOneByteReadNoEOF{false, data}
}

// testOneByteReadNoEOF - implements io.Reader which returns 1 byte and nil error, but
// returns io.EOF on the next Read().
type testOneByteReadNoEOF struct {
	eof  bool
	data []byte
}

func (r *testOneByteReadNoEOF) Read(p []byte) (n int, err error) {
	if r.eof {
		return 0, io.EOF
	}
	n = copy(p, r.data)
	r.eof = true
	return n, nil
}

) (validation.Warning, error) {
	yamlReader := kubeyaml.NewYAMLReader(bufio.NewReader(reader))
	var errs error
	var warnings validation.Warning
	for {
		doc, err := yamlReader.Read()
		if err == io.EOF {
			return warnings, errs
		}
		if err != nil {
			errs = multierror.Append(errs, multierror.Prefix(err, fmt.Sprintf("failed to decode file %s: ", path)))
			return warnings, errs
		}

You can read more at the end of this page.

///

## `Field` additional arguments

When using `Field()` with Pydantic models, you can also declare additional `examples`:

//// tab | Python 3.10+

			// Ignore trace logs beyond the following conditions
			for _, name := range matchingFuncNames {
				if funcName == name {
					return trace
				}
			}
		}
		traceLevel++
		// Read stack trace information from PC
		pc, file, lineNumber, ok = runtime.Caller(traceLevel)
	}
	return trace
}

// HashString - return the highway hash of the passed string
func HashString(input string) string {

We see that we are going to need some dependencies used in several places of the application.

So we put them in their own `dependencies` module (`app/dependencies.py`).

We will now use a simple dependency to read a custom `X-Token` header:

//// tab | Python 3.9+

```Python hl_lines="3  6-8" title="app/dependencies.py"
{!> ../../docs_src/bigger_applications/app_an_py39/dependencies.py!}
```

////

     *
     * <ul>
     *   <li>If this field's value == currentThread, we know that it's up to date, because write
     *       operations in a thread always happen-before subsequent read operations in the same
     *       thread
     *   <li>If this field's value == null because of unsafe publication, we know that it isn't the

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