Verify that filter definitions are properly merged.
  </description>

  <build>
    <filters>
      <filter>src/main/filters/child-a.properties</filter>
      <filter>src/main/filters/child-c.properties</filter>
      <filter>src/main/filters/child-b.properties</filter>
      <filter>src/main/filters/child-d.properties</filter>
    </filters>
  </build>

test:linux_cpu_pycpp_test_filters --test_tag_filters=-no_oss,-oss_excluded,-oss_serial,-gpu,-tpu,-benchmark-test,-v1only
test:linux_cpu_pycpp_test_filters --build_tag_filters=-no_oss,-oss_excluded,-oss_serial,-gpu,-tpu,-benchmark-test,-v1only
test:linux_cpu_pycpp_test_filters --test_lang_filters=cc,py --test_size_filters=small,medium

  </description>

  <build>
    <filters>
      <!-- NOTE: The first filter is deliberately defined by the child as well, so should not be added twice -->
      <filter>src/main/filters/child-a.properties</filter>
      <filter>src/main/filters/parent-c.properties</filter>
      <filter>src/main/filters/parent-b.properties</filter>
      <filter>src/main/filters/parent-d.properties</filter>
    </filters>
  </build>

* 还有一个 `app/dependencies.py` 文件，就像 `app/main.py` 一样，它是一个「模块」：`app.dependencies`。
* 有一个子目录 `app/routers/` 包含另一个 `__init__.py` 文件，因此它是一个「Python 子包」：`app.routers`。
* 文件 `app/routers/items.py` 位于 `app/routers/` 包中，因此它是一个子模块：`app.routers.items`。
* 同样适用于 `app/routers/users.py`，它是另一个子模块：`app.routers.users`。
* 还有一个子目录 `app/internal/` 包含另一个 `__init__.py` 文件，因此它是又一个「Python 子包」：`app.internal`。

  <artifactId>b</artifactId>
  <version>1.0</version>

    <build>
        <filters>
            <filter>src/main/filters/a.properties</filter>
            <filter>src/main/filters/c.properties</filter>
            <filter>src/main/filters/b.properties</filter>
            <filter>src/main/filters/d.properties</filter>
        </filters>
    </build>

              ],
              "listener_filters": [
                {
                  "name": "envoy.filters.listener.original_dst",
                  "typed_config": {
                    "@type": "type.googleapis.com/envoy.extensions.filters.listener.original_dst.v3.OriginalDst"
                  }
                },
                {
                  "name": "envoy.filters.listener.http_inspector",

            }

            if (build.getFilters() != null) {
                List<String> filters = new ArrayList<>();
                for (String filter : build.getFilters()) {
                    filters.add(alignToBaseDirectory(filter, basedir));
                }
                build.setFilters(filters);
            }

            build.setOutputDirectory(alignToBaseDirectory(build.getOutputDirectory(), basedir));

* Es gibt ein Unterverzeichnis `app/routers/` mit einer weiteren Datei `__init__.py`, es handelt sich also um ein „Python-Subpackage“: `app.routers`.
* Die Datei `app/routers/items.py` befindet sich in einem Package, `app/routers/`, also ist sie ein Submodul: `app.routers.items`.
* Das Gleiche gilt für `app/routers/users.py`, es ist ein weiteres Submodul: `app.routers.users`.

  <build>
    <resources>
      <resource>
        <directory>${pom.build.directory}/generated-resources/plexus</directory>
      </resource>
    </resources>

    <filters>
      <filter>${pom.build.directory}/generated-filters.properties</filter>
    </filters>

    <directory>target</directory>

    <sourceDirectory>src/main/java</sourceDirectory>
    <testSourceDirectory>src/test/java</testSourceDirectory>

                    };
                    filters.add(new PredicateVersionFilter(predicate));
                } else {
                    throw new IllegalArgumentException("Unsupported filter expression: " + expression);
                }
            }
        }
        if (filters.isEmpty()) {
            return null;
        } else if (filters.size() == 1) {
            return filters.get(0);
        } else {