this.className = checkNotNull(className);
    }

    /**
     * Configures the {@link ToStringHelper} so {@link #toString()} will ignore properties with null
     * value. The order of calling this method, relative to the {@code add()}/{@code addValue()}
     * methods, is not significant.
     *
     * @since 18.0 (since 12.0 as {@code Objects.ToStringHelper.omitNullValues()}).
     */
    @CanIgnoreReturnValue

            return modelSource.getLocation();
        }

        @Override
        @Nullable
        public Source resolve(@Nonnull String relative) {
            if (modelSource instanceof ModelSource2 ms) {
                return toSource(ms.getRelatedSource(relative));
            } else {
                return null;
            }
        }

        @Override
        public boolean equals(Object o) {

public class EnvironmentUtils {

    private static Properties envVars;

    /**
     * Adds the environment variables in the form of properties whose keys are prefixed with {@code env.}, e.g. {@code
     * env.PATH}. Unlike native environment variables, properties are always case-sensitive. For the sake of
     * determinism, the environment variable names will be normalized to upper case on platforms with case-insensitive
     * variable lookup.
     *

Daher verwenden wir einen relativen Import mit `..` für die Abhängigkeiten:

{* ../../docs_src/bigger_applications/app_an_py39/routers/items.py hl[3] title["app/routers/items.py"] *}

#### Wie relative Importe funktionieren { #how-relative-imports-work }

/// tip | Tipp

Wenn Sie genau wissen, wie Importe funktionieren, fahren Sie mit dem nächsten Abschnitt unten fort.

///

Ein einzelner Punkt `.`, wie in:

      "coverage" : {
        "per_day" : [ "linux" ]
      }
    } ]
  }, {
    "testId" : "org.gradle.performance.regression.buildcache.TaskOutputCachingNativePerformanceTest.clean assemble with local cache (native project)",
    "groups" : [ {
      "testProject" : "bigCppApp",
      "coverage" : {
        "per_day" : [ "linux" ]
      }
    }, {
      "testProject" : "bigCppMulti",
      "coverage" : {

        problems.setSource("");

        userSettings = interpolate(userSettings, request, problems);

        // for the special case of a drive-relative Windows path, make sure it's absolute to save plugins from trouble
        String localRepository = userSettings.getLocalRepository();
        if (localRepository != null && !localRepository.isEmpty()) {

            if (id.equals(selector)) {
                return true;
            }

            id = project.getGroupId() + id;

            return id.equals(selector);
        }

        // relative path, e.g. "sub", "../sub" or "."
        else if (reactorDirectory != null) {
            File selectedProject =
                    new File(new File(reactorDirectory, selector).toURI().normalize());

    assertEquals("/a/b/c/g;x=1/y", simplifyPath("/a/b/c/g;x=1/./y"));
    assertEquals("/a/b/c/y", simplifyPath("/a/b/c/g;x=1/../y"));
  }

  /** http://gbiv.com/protocols/uri/rfc/rfc3986.html#relative-normal */
  public void testRfc3986Normal() {
    assertEquals("/a/b/c/g", simplifyPath("/a/b/c/g"));
    assertEquals("/a/b/c/g", simplifyPath("/a/b/c/./g"));
    assertEquals("/a/b/c/g", simplifyPath("/a/b/c/g/"));

``` hl_lines="5"
.
├── app
│   ├── __init__.py
│   ├── main.py
│   └── test_main.py
```

Because this file is in the same package, you can use relative imports to import the object `app` from the `main` module (`main.py`):

{* ../../docs_src/app_testing/app_a_py39/test_main.py hl[3] *}


...and have the code for the tests just like before.

        // Find the common root of all POM paths to preserve relative structure
        Path commonRoot = findCommonRoot(pomMap.keySet());
        context.debug("Common root: " + commonRoot);

        // Write each POM to the temp directory, preserving relative structure
        for (Map.Entry<Path, Document> entry : pomMap.entrySet()) {
            Path originalPath = entry.getKey();