MavenExecutionException.class,
                () -> sut.getRequiredProjectsBySelectors(mavenExecutionRequest, listOfProjects, selectors));
        assertTrue(exception.getMessage().contains("Could not find"));
        assertTrue(exception.getMessage().contains(":required"));
    }

    @Test
    void getRequiredProjectsBySelectorsReturnsProject() throws MavenExecutionException {

      if (foundTrustedCertificate) {
        return result
      }

      // The last link isn't trusted. Fail.
      throw SSLPeerUnverifiedException(
        "Failed to find a trusted cert that signed $toVerify",
      )
    }

    throw SSLPeerUnverifiedException("Certificate chain too long: $result")
  }

  /**

    this
} else {
    val parent = dir("..")
    when {
        parent.file("version.txt").asFile.exists() -> parent
        this == parent -> error("Cannot find 'version.txt' file in root of repository")
        else -> parent.parentOrRoot()
    }
}


fun Project.releasedVersionsFile() = repoRoot().file("released-versions.json")


/**

   * will match, use {@link #tryFind} or {@link #find(Iterable, Predicate, Object)} instead.
   *
   * <p><b>{@code Stream} equivalent:</b> {@code stream.filter(predicate).findFirst().get()}
   *
   * @throws NoSuchElementException if no element in {@code iterable} matches the given predicate
   */
  @ParametricNullness
  public static <T extends @Nullable Object> T find(
      Iterable<T> iterable, Predicate<? super T> predicate) {

  ) {
    logEvent(ConnectionEvent.ConnectionAcquired(System.nanoTime(), connection, call))
  }

  override fun connectionReleased(
    connection: Connection,
    call: Call,
  ) {
    if (eventSequence.find { it is ConnectionEvent.ConnectStart && it.connection == connection } != null && connection is RealConnection) {
      if (connection.noNewExchanges) {
        assertThat(eventSequence).matchesPredicate { deque ->

    }

    public boolean isActive() {
        return active;
    }

    public void enable() {
        active = true;

        // TODO if it was null, we really need to go find them now... or is this taken care of by the ordering?
        if (children != null) {
            for (ResolutionNode node : children) {
                node.enable();
            }
        }
    }

* You can then further modify the `response` before returning it.

{* ../../docs_src/middleware/tutorial001_py39.py hl[8:9,11,14] *}

/// tip

Keep in mind that custom proprietary headers can be added <a href="https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers" class="external-link" target="_blank">using the `X-` prefix</a>.

## Code size { #code-size }

This example might seem verbose. Keep in mind that we are mixing security, data models, utility functions and *path operations* in the same file.

But here's the key point.

The security and dependency injection stuff is written once.

            ?.text()
            ?.lines()
            ?.firstOrNull { it.contains("buildToolsVersion = ") }
            ?.substringAfter("buildToolsVersion = ")
            ?.trim('"', ' ')
            ?: error("Couldn't find buildToolsVersion on $buildToolsUrl")

    companion object {

        @VisibleForTesting
        @JvmStatic

So, when you type `python` in the terminal, the system will find the Python program in

```plaintext
C:\Users\user\code\awesome-project\.venv\Scripts\python
```

and use that one.

////