// Scan advances the [Scanner] to the next token, which will then be
// available through the [Scanner.Bytes] or [Scanner.Text] method. It returns false when
// there are no more tokens, either by reaching the end of the input or an error.
// After Scan returns false, the [Scanner.Err] method will return any error that
// occurred during scanning, except that if it was [io.EOF], [Scanner.Err]
// will return nil.

```Python hl_lines="10"
{!> ../../docs_src/header_param_models/tutorial002.py!}
```

////

If a client tries to send some **extra headers**, they will receive an **error** response.

For example, if the client tries to send a `tool` header with a value of `plumbus`, they will receive an **error** response telling them that the header parameter `tool` is not allowed:

```json
{
    "detail": [
        {

// If the configuration is invalid, a full redeployal of config, binaries, and svcAcct credentials to the
// shared node CNI dir will be attempted.
//
// If changes occurred but the config is still valid, only the binaries and (optionally) svcAcct credentials
// will be redeployed.
func (in *Installer) Run(ctx context.Context) error {
	installedBins, err := in.installAll(ctx)
	if err != nil {
		return err
	}

  // is considered to be failed. The deployment controller will continue to
  // process failed deployments and a condition with a ProgressDeadlineExceeded
  // reason will be surfaced in the deployment status. Note that progress will
  // not be estimated during the time a deployment is paused. This is set to
  // the max value of int32 (i.e. 2147483647) by default, which means "no deadline".
  // +optional

    }
    filesToDelete.add(tempFile);
    return tempFile;
  }

  /**
   * Gets a temp dir for testing. The returned directory and all contents of it will be deleted in
   * the tear-down for this test. Subsequent invocations of this method will return the same
   * directory.
   */
  protected final File getTempDir() throws IOException {
    if (tempDir == null) {
      tempDir = createTempDir();
    }

    )
  }

  /**
   * Process the next protocol frame.
   *
   *  * If it is a control frame this will result in a single call to [FrameCallback].
   *  * If it is a message frame this will result in a single call to [FrameCallback.onReadMessage].
   *    If the message spans multiple frames, each interleaved control frame will result in a
   *    corresponding call to [FrameCallback].
   */
  @Throws(IOException::class)

 *  * The server's handshake certificates must include a set of trusted root certificates. They
 *    will be used to authenticate the client's certificate chain. Typically this is not the same
 *    set of root certificates used in server authentication. Instead it will be a small set of
 *    roots private to an organization or service.
 */
class HandshakeCertificates private constructor(

 *  * **[Hit Count:][hitCount]** the number of those requests whose responses were served by the
 *    cache.
 *
 * Sometimes a request will result in a conditional cache hit. If the cache contains a stale copy of
 * the response, the client will issue a conditional `GET`. The server will then send either
 * the updated response if it has changed, or a short 'not modified' response if the client's copy

// ContainerResourceMetricSource indicates how to scale on a resource metric known to
// Kubernetes, as specified in requests and limits, describing each pod in the
// current scale target (e.g. CPU or memory).  The values will be averaged
// together before being compared to the target.  Such metrics are built in to
// Kubernetes, and have special scaling options on top of those available to

        } while( len > 0 && n == r );

        return (int)(fp - start);
    }
/**
 * This stream class is unbuffered. Therefore this method will always
 * return 0 for streams connected to regular files. However, a 
 * stream created from a Named Pipe this method will query the server using a
 * "peek named pipe" operation and return the number of available bytes
 * on the server.
 */