}

    /**
     * Sets the system properties to use for interpolation and profile activation. The system properties are collected
     * from the runtime environment like {@link System#getProperties()} and environment variables.
     *
     * @param systemProperties The system properties, may be {@code null}.
     * @return This context, never {@code null}.
     */
    @SuppressWarnings("unchecked")

    /**
     * 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.
     *

    /**
     * Sets the system properties to use for interpolation and profile activation. The system properties are collected
     * from the runtime environment like {@link System#getProperties()} and environment variables.
     *
     * @param systemProperties The system properties, may be {@code null}.
     * @return This request, never {@code null}.
     */
    MavenExecutionRequest setSystemProperties(Properties systemProperties);

   |
   | For example, if you have an integration testing plugin - like cactus - that needs to know where
   | your Tomcat instance is installed, you can provide a variable here such that the variable is
   | dereferenced during the build process to configure the cactus plugin.
   |
   | As noted above, profiles can be activated in a variety of ways. One way - the activeProfiles

    /**
     * Sets the system properties to use for interpolation and profile activation. The system properties are collected
     * from the runtime environment like {@link System#getProperties()} and environment variables.
     *
     * @param systemProperties The system properties, may be {@code null}.
     * @return This request, never {@code null}.
     */
    ProjectBuildingRequest setSystemProperties(Properties systemProperties);

    /**
     * Gets the system properties to use for interpolation and profile activation. The system properties are collected
     * from the runtime environment like {@link System#getProperties()} and environment variables.
     *
     * @return The execution properties, never {@code null}.
     */
    Map<String, String> getSystemProperties();

    /**

package org.apache.maven.configuration;

/**
 * Preprocesses a value from a bean configuration before the bean configurator unmarshals it into a bean property. A
 * common use case for such preprocessing is the evaluation of variables within the configuration value.
 *
 */
public interface BeanConfigurationValuePreprocessor {

    /**
     * Preprocesses the specified bean configuration value. The optional type provided to this method is a hint (not a

            problems.add(new DefaultBuilderProblem(
                    null,
                    -1,
                    -1,
                    e,
                    "Failed to use environment variables for interpolation: " + e.getMessage(),
                    BuilderProblem.Severity.WARNING));
        }

        return new MavenToolchainsTransformer(value -> {
                    try {

      matrix:
        os: [ubuntu-latest, windows-latest, macOS-latest]
        java: [17, 21]

      fail-fast: false
    runs-on: ${{ matrix.os }}

    steps:
      - name: Collect environment context variables
        shell: bash
        env:
          PR_HEAD_LABEL: ${{ github.event.pull_request.head.label }}
        run: |
          set +e
          repo=maven-integration-testing
          target_branch=master

            problems.add(new DefaultBuilderProblem(
                    null,
                    -1,
                    -1,
                    e,
                    "Failed to use environment variables for interpolation: " + e.getMessage(),
                    BuilderProblem.Severity.WARNING));
        }

        return new SettingsTransformer(value -> {
                    try {