```Python hl_lines="1  4"
{!../../docs_src/python_types/tutorial009.py!}
```

Usar `Optional[str]` en lugar de solo `str` te permitirá al editor ayudarte a detectar errores donde podrías estar asumiendo que un valor siempre es un `str`, cuando en realidad también podría ser `None`.

`Optional[Something]` es realmente un atajo para `Union[Something, None]`, son equivalentes.

    /**
     * Short distinct name of CI system: "GH", "Jenkins", etc.
     */
    @Nonnull
    String name();

    /**
     * May return a message that will be logged by Maven explaining why it was detected (and possibly more).
     */
    @Nonnull
    default String message() {
        return "";
    }

    /**
     * Some CI systems may allow running jobs in "debug" (or some equivalent) mode.
     */

     * If not explicitly set, this value will be detected during parsing.
     *
     * @return the current working directory path, or null if not set
     */
    @Nullable
    Path cwd();

    /**
     * Returns the Maven home directory.
     * If not explicitly set, this value will be detected during parsing.
     *
     * @return the Maven home directory path, or null if not set

 */
package okhttp3.internal.proxy

import java.io.IOException
import java.net.Proxy
import java.net.ProxySelector
import java.net.SocketAddress
import java.net.URI

/**
 * A proxy selector that always returns the [Proxy.NO_PROXY].
 */
object NullProxySelector : ProxySelector() {
  override fun select(uri: URI?): List<Proxy> {
    requireNotNull(uri) { "uri must not be null" }
    return listOf(Proxy.NO_PROXY)

* testing (as in software testing): escribir pruebas (do not translate to "probar")
* code base: code base (do not translate to "base de código")
* default: por defecto (do not translate to "predeterminado")
* default values: valores por defecto (do not translate to "valores predeterminados")
* media type: media type (do not translate to "tipo de medio")
* instantiate: crear un instance (do not translate to "instanciar")

        // The normalization removes all duplicate backslashes, so \\\\server becomes \server
        // This test validates that paths which should be UNC but aren't detected due to normalization
        // still pass validation (which is the current behavior, though not ideal)

        // These paths normalize to \server\share which is NOT detected as UNC due to normalization

  /**
   * Returns this address's explicitly-specified HTTP proxy, or null to delegate to the
   * [proxy selector][proxySelector].
   */
  @get:JvmName("proxy") val proxy: Proxy?,
  protocols: List<Protocol>,
  connectionSpecs: List<ConnectionSpec>,
  /**
   * Returns this address's proxy selector. Only used if the proxy is null. If none of this
   * selector's proxies are reachable, a direct connection will be attempted.
   */

		URL:    &url.URL{Path: grid.RoutePath},
	}
	if !guessIsRPCReq(r) {
		t.Fatal("Grid RPC path not detected")
	}
	r = &http.Request{
		Proto:  "HTTP/1.1",
		Method: http.MethodGet,
		URL:    &url.URL{Path: grid.RouteLockPath},
	}
	if !guessIsRPCReq(r) {
		t.Fatal("Grid RPC path not detected")
	}
}

var isHTTPHeaderSizeTooLargeTests = []struct {
	header     http.Header
	shouldFail bool
}{

   *       collections intelligently fall back to a binary search tree if hash table collisions are
   *       detected. Rather than going to all the trouble of reimplementing this ourselves, we
   *       simply switch over to use the JDK implementation wholesale if probable hash flooding is
   *       detected, sacrificing the compactness guarantee in very rare cases in exchange for much
   *       more reliable worst-case behavior.

        SMBUtil.writeInt2(65535, buffer2, 58);

        // Test should detect buffer overflow (this is working correctly!)
        SMBProtocolDecodingException exception = assertThrows(SMBProtocolDecodingException.class, () -> {
            response.readBytesWireFormat(buffer, 0);
        });

        // The validation correctly detects when buffer extends beyond available data