}
                } catch (final Exception e) {
                    logger.warn("Failed to read a sugget elevate word: {}", list, e);
                }
            }
            elevateWordBhv.refresh();
        } catch (final IOException e) {
            logger.warn("Failed to read a sugget elevate word.", e);
        }
    }

    /**
     * Exports elevate words to a CSV file.

We see that we are going to need some dependencies used in several places of the application.

So we put them in their own `dependencies` module (`app/dependencies.py`).

We will now use a simple dependency to read a custom `X-Token` header:

//// tab | Python 3.9+

```Python hl_lines="3  6-8" title="app/dependencies.py"
{!> ../../docs_src/bigger_applications/app_an_py39/dependencies.py!}
```

////

import javax.net.ssl.SSLHandshakeException;

import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertTrue;
import static org.junit.Assert.fail;

/**
 * Let's Encrypt expiring root test.
 *
 * Read https://community.letsencrypt.org/t/mobile-client-workarounds-for-isrg-issue/137807
 * for background.
 */
@RunWith(AndroidJUnit4.class)
public class LetsEncryptTest {

     * track the problem back to its origin. A concrete example for such a source hint can be the file path or URL from
     * which the settings were read.
     *
     * @return the hint about the source of the problem or an empty string if unknown, never {@code null}
     */
    @Nonnull
    String getSource();

    /**

          "fullMetaSearch": false,
          "hide": false,
          "includeNullMetadata": true,
          "instant": false,
          "legendFormat": "Pool {{pool}} / Set {{set}} - Read Quorum",
          "range": true,
          "refId": "B",
          "useBackend": false
        },
        {
          "datasource": {
            "type": "prometheus",

 * in the {@link Iterators} class.
 *
 * <p><b>Java 8+ users:</b> several common uses for this class are now more comprehensively
 * addressed by the new {@link java.util.stream.Stream} library. Read the method documentation below
 * for comparisons. This class is not being deprecated, but we gently encourage you to migrate to
 * streams.
 *

  val connectTimeout: Int by option(
    "--connect-timeout",
  ).help(
    "Maximum time allowed for connection (seconds)",
  ).int()
    .default(DEFAULT_TIMEOUT)

  val readTimeout: Int by option("--read-timeout")
    .help("Maximum time allowed for reading data (seconds)")
    .int()
    .default(DEFAULT_TIMEOUT)

  val callTimeout: Int by option(
    "--call-timeout",
  ).help(

                log.println("session established ok with " + address);
            }
            return;
        case SessionServicePacket.NEGATIVE_SESSION_RESPONSE:
            final int errorCode = in.read() & 0xFF;
            close();
            throw new NbtException(NbtException.ERR_SSN_SRVC, errorCode);
        case -1:
            throw new NbtException(NbtException.ERR_SSN_SRVC, NbtException.CONNECTION_REFUSED);

        m.ptype = 0;
        m.flags = 0x05;
        m.call_id = 0x123;

        NdrBuffer buf = new NdrBuffer(new byte[1024], 0);
        m.encode(buf);

        // Reset to read what was written
        buf.setIndex(0);

        // Verify header was written correctly
        assertEquals(5, buf.dec_ndr_small()); // RPC version
        assertEquals(0, buf.dec_ndr_small()); // minor version

      +  "-----END CERTIFICATE-----");

  private final OkHttpClient client;

  public CustomTrust() {
    // This implementation just embeds the PEM files in Java strings; most applications will
    // instead read this from a resource file that gets bundled with the application.

    HandshakeCertificates certificates = new HandshakeCertificates.Builder()
        .addTrustedCertificate(letsEncryptCertificateAuthority)