do {
                            if (path == null) {
                                /* Store references to the map and key so that
                                 * SmbFile.resolveDfs can re-insert the dr list with
                                 * the dr that was successful so that subsequent
                                 * attempts to resolve DFS use the last successful
                                 * referral first.

* Enforce security, authentication, role requirements, etc.
* And many other things...

All these, while minimizing code repetition.

## First Steps { #first-steps }

Let's see a very simple example. It will be so simple that it is not very useful, for now.

But this way we can focus on how the **Dependency Injection** system works.

### Create a dependency, or "dependable" { #create-a-dependency-or-dependable }

   * than a one-character array containing the character itself. This enables the escaping algorithm
   * to perform more efficiently.
   *
   * <p>An escaper is expected to be able to deal with any {@code char} value, so this method should
   * not throw any exceptions.
   *
   * @param c the character to escape if necessary
   * @return the replacement characters, or {@code null} if no escaping was needed
   */

The key factor is that a dependency should be a "callable".

A "**callable**" in Python is anything that Python can "call" like a function.

So, if you have an object `something` (that might _not_ be a function) and you can "call" it (execute it) like:

```Python
something()
```

or

```Python
something(some_argument, some_keyword_argument="foo")

        result = virtualHostHelper.processVirtualHost(s -> "processed_" + s, "default");
        assertEquals("processed_site1", result);

        // Headers persist in same request, so subsequent headers are additive
        // Test with case insensitive matching
        request.addHeader("X-Forwarded-Host", "TEST.COM");
        result = virtualHostHelper.processVirtualHost(s -> "processed_" + s, "default");

```Python
images: List[Image]
```

oder in Python 3.9 und darüber:

```Python
images: list[Image]
```

so wie in:

{* ../../docs_src/body_nested_models/tutorial008_py39.py hl[13] *}

## Editor-Unterstützung überall

Und Sie erhalten Editor-Unterstützung überall.

Selbst für Dinge in Listen:

    for prod and one for tests. However, unlike our other packages, as of this
    writing it has test supersource but no prod supersource.

    GWT happens to use the prod .gwt.xml, so it looks for no supersource for
    tests, either. This causes it to fail to find AtomicLongMapTest.

    Our workaround is to tell GWT that util.concurrent and all other packages

    for prod and one for tests. However, unlike our other packages, as of this
    writing it has test supersource but no prod supersource.

    GWT happens to use the prod .gwt.xml, so it looks for no supersource for
    tests, either. This causes it to fail to find AtomicLongMapTest.

    Our workaround is to tell GWT that util.concurrent and all other packages

		// Previously, this value was set right before a response was sent to
		// the client. So, logger and Error response XML were not using this
		// value. This is set here so that this header can be logged as
		// part of the log entry, Error response XML and auditing.
		// Set custom headers such as x-amz-request-id for each request.

 * limitations under the License.
 */
package okhttp3

import java.io.IOException
import java.util.concurrent.TimeUnit

/**
 * Records received HTTP responses so they can be later retrieved by tests.
 */
class RecordingCallback : Callback {
  private val responses = mutableListOf<RecordedResponse>()

  @Synchronized
  override fun onFailure(
    call: Call,