method.invoke(null, (Object[]) null);
        } catch (final ClassNotFoundException e) {
            // ignore
        } catch (final Exception e) {
            logger.warn("Could not shutdown Commons HttpClient.", e);
        }
    }

   */
  fun redact(): String =
    newBuilder("/...")!!
      .username("")
      .password("")
      .build()
      .toString()

  /**
   * Returns the URL that would be retrieved by following `link` from this URL, or null if the
   * resulting URL is not well-formed.
   */
  fun resolve(link: String): HttpUrl? = newBuilder(link)?.build()

  /**

   *     directly, or use a combination of {@link #throwIfUnchecked} and {@code throw new
   *     RuntimeException(e)}. But consider whether users would be better off if your API threw a
   *     different type of exception. For background on the deprecation, read <a
   *     href="https://github.com/google/guava/wiki/Why-we-deprecated-Throwables.propagate">Why we

* Public or private harassment
* Publishing others' private information, such as a physical or electronic
  address, without explicit permission
* Other conduct which could reasonably be considered inappropriate in a
  professional setting

## Our Responsibilities

Project maintainers are responsible for clarifying the standards of acceptable

 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package okhttp3

import okio.IOException

interface Callback {
  /**
   * Called when the request could not be executed due to cancellation, a connectivity problem or
   * timeout. Because networks can fail during an exchange, it is possible that the remote server
   * accepted the request before the failure.
   */
  fun onFailure(

    // Don't use checkState(), because we don't want the overhead of generating the error message
    // unless it's actually going to be used; validate() is called for all set method calls, so it
    // needs to be fast.
    // (We could instead generate the message once, when the set is created, but zero is better.)
    if (!validator.get()) {
      throw new IllegalStateException(errorMessage.get());
    }
  }

    // The WHATWG Host parsing rules accepts some character codes which are invalid by
    // definition for OkHttp's host header checks (and the WHATWG Host syntax definition). Here
    // we rule out characters that would cause problems in host headers.
    if (c <= '\u001f' || c >= '\u007f') {
      return true
    }
    // Check for the characters mentioned in the WHATWG Host parsing spec:

- `main.py` নামে একটি ফাইল তৈরি করুন:

```Python
from typing import Union

from fastapi import FastAPI

app = FastAPI()


@app.get("/")
def read_root():
    return {"Hello": "World"}


@app.get("/items/{item_id}")
def read_item(item_id: int, q: Union[str, None] = None):
    return {"item_id": item_id, "q": q}
```

<details markdown="1">

        // Override purge to avoid client operations
        ThumbnailManager testManager = new ThumbnailManager() {
            @Override
            public long purge(long expiry) {
                // Just count files that would be deleted
                return 1L;
            }
        };
        testManager.baseDir = tempDir;

        long result = testManager.purge(1L);
        assertTrue(result >= 0); // Count of deleted files

  /**
   * This field's name "only-if-cached" is misleading. It actually means "do not use the network".
   * It is set by a client who only wants to make a request if it can be fully satisfied by the
   * cache. Cached responses that would require validation (ie. conditional gets) are not permitted
   * if this header is set.
   */
  @get:JvmName("onlyIfCached") val onlyIfCached: Boolean,
  @get:JvmName("noTransform") val noTransform: Boolean,