## Classes as dependencies { #classes-as-dependencies_1 }

You might notice that to create an instance of a Python class, you use that same syntax.

For example:

```Python
class Cat:
    def __init__(self, name: str):
        self.name = name


fluffy = Cat(name="Mr Fluffy")
```

In this case, `fluffy` is an instance of the class `Cat`.

And to create `fluffy`, you are "calling" `Cat`.

 */
@Deprecated(since = "4.0.0")
public interface ToolchainFactory {
    /**
     * Create instance of toolchain.
     **/
    ToolchainPrivate createToolchain(ToolchainModel model) throws MisconfiguredToolchainException;

    /**
     * Returns the default instance of the particular type of toolchain, can return <code>null</code>
     * if not applicable.
     * TODO keep around??
     **/

     * @return this builder instance for method chaining
     */
    public ExtractorBuilder mimeType(final String mimeType) {
        this.mimeType = mimeType;
        return this;
    }

    /**
     * Sets the filename of the content to extract.
     *
     * @param filename the filename to set
     * @return this builder instance for method chaining
     */

      new ImmutableClassToInstanceMap<>(ImmutableMap.<Class<?>, Object>of());

  /**
   * Returns an empty {@code ImmutableClassToInstanceMap}.
   *
   * <p><b>Performance note:</b> the instance returned is a singleton.
   *
   * @since 19.0
   */
  @SuppressWarnings("unchecked")
  public static <B> ImmutableClassToInstanceMap<B> of() {
    return (ImmutableClassToInstanceMap<B>) EMPTY;
  }

  /**

    /**
     * The properties file.
     */
    protected volatile File propertiesFile;

    /**
     * The properties instance.
     */
    protected volatile Properties properties;

    /**
     * Constructs a {@code DynamicProperties} instance with the specified file path.
     *
     * @param path

    /**
     * A map of regular expression patterns to crawler clients.
     */
    protected Map<Pattern, CrawlerClient> clientMap = new LinkedHashMap<>();

    /**
     * Creates a new instance of CrawlerClientFactory.
     */
    public CrawlerClientFactory() {
        // NOP
    }

    /**
     * Initializes the CrawlerClientFactory.

public class NTLMSchemeProvider implements AuthSchemeProvider {

    /**
     * Creates a new NTLMSchemeProvider instance.
     */
    public NTLMSchemeProvider() {
        super();
    }

    /**
     * Creates a new NTLMScheme instance.
     * @param context The HTTP context.
     * @return A new NTLMScheme instance.
     */
    @Override
    public AuthScheme create(final HttpContext context) {

 * <p>There are two ways to obtain a {@code Stats} instance:
 *
 * <ul>
 *   <li>If all the values you want to summarize are already known, use the appropriate {@code
 *       Stats.of} factory method below. Primitive arrays, iterables and iterators of any kind of
 *       {@code Number}, and primitive varargs are supported.
 *   <li>Or, to avoid storing up all the data first, create a {@link StatsAccumulator} instance,

     */
    public static void setInstance(final PrintStream stream) {
        inst = new LogStream(stream);
    }

    /**
     * Returns the singleton LogStream instance.
     *
     * @return the LogStream instance
     */
    public static LogStream getInstance() {
        if (inst == null) {
            setInstance(System.err);
        }
        return inst;
    }

public interface PrimitiveSink {
  /**
   * Puts a byte into this sink.
   *
   * @param b a byte
   * @return this instance
   */
  @CanIgnoreReturnValue
  PrimitiveSink putByte(byte b);

  /**
   * Puts an array of bytes into this sink.
   *
   * @param bytes a byte array
   * @return this instance
   */
  @CanIgnoreReturnValue
  PrimitiveSink putBytes(byte[] bytes);

  /**