/**
 * Component for use by the <code>maven-toolchains-plugin</code> only.
 * It provides API: <ol>
 * <li>to retrieve every toolchains available in user settings,</li>
 * <li>to store chosen toolchain into build context for later use by toolchain-aware plugins.</li>
 * </ol>
 *
 * @since 2.0.9
 * @see ToolchainManager#getToolchainFromBuildContext(String, MavenSession)

 * </ol>
 * <p>By caching artifacts in the local repository, Maven minimizes the need to repeatedly download the same artifacts, thus optimizing the build process.</p>
 *
 * <h2>Repository Configuration</h2>
 *
 * <p>Repositories can be configured at various levels:<ol>

/**
 * There are various forms of results that are represented by this class:
 * <ol>
 * <li>success - in which case only the model field is set
 * <li>success with warnings - model field + non-error model problems
 * <li>error - no model, but diagnostics
 * <li>error - (partial) model and diagnostics
 * </ol>
 * Could encode these variants as subclasses, but kept in one for now
 *
 * @param <T> the model type

 *
 * <p>To add new upgrade strategies:</p>
 * <ol>
 *   <li>Implement {@link org.apache.maven.cling.invoker.mvnup.goals.UpgradeStrategy}</li>
 *   <li>Optionally extend {@link org.apache.maven.cling.invoker.mvnup.goals.AbstractUpgradeStrategy}</li>
 *   <li>Annotate with {@code @Named} and {@code @Singleton}</li>
 *   <li>Use {@code @Priority} to control execution order</li>
 * </ol>
 *
 * @since 4.0.0
 */

 *
 * <p>Repositories can be configured at various levels:</p><ol>
 * <li>POM: Repositories can be specified in the {@code pom.xml} file under the {@code <repositories>} and {@code <pluginRepositories>} sections.</li>
 * <li>Settings: the {@code settings.xml} can be used to provide additional repositories in the three level of settings (user, project, installation).</li>
 * </ol>

 * Transformations can be applied at three different stages:
 * <ol>
 *   <li>File model - The raw model as read directly from the file</li>
 *   <li>Raw model - The model after inheritance has been applied</li>
 *   <li>Effective model - The fully processed model with all interpolation and inheritance applied</li>
 * </ol>
 * <p>

 *     when they are not available locally.</li>
 * </ul>
 *
 * <p>When resolving artifacts, Maven follows this order:</p><ol>
 * <li>Check Local Repository: Maven first checks if the artifact is available in the local repository.</li>

	}
	return err
}

func lockFileEx(h syscall.Handle, flags, locklow, lockhigh uint32, ol *syscall.Overlapped) (err error) {
	reserved := uint32(0)
	r1, _, e1 := syscall.Syscall6(procLockFileEx.Addr(), 6, uintptr(h), uintptr(flags),
		uintptr(reserved), uintptr(locklow), uintptr(lockhigh), uintptr(unsafe.Pointer(ol)))
	if r1 == 0 {
		if e1 != 0 {
			err = error(e1)
		} else {
			err = syscall.EINVAL
		}

 *
 * <h3>Model Version Upgrades</h3>
 * <ul>
 *   <li><strong>4.0.0 → 4.1.0</strong>: Upgrades Maven 3.x POMs to Maven 4.1.0 format</li>
 * </ul>
 *
 * <h3>4.0.0 → 4.1.0 Upgrade Process</h3>
 * <ol>
 *   <li><strong>Namespace Update</strong>: Changes namespace from Maven 4.0.0 to 4.1.0 for all elements</li>
 *   <li><strong>Schema Location Update</strong>: Updates xsi:schemaLocation to Maven 4.1.0 XSD</li>

     * directory for copying files.
     * </p>
     * <p>
     * <strong>Resolution Algorithm:</strong>
     * </p>
     * <ol>
     *   <li>Obtain the {@linkplain #targetPath() configured target path} (which may be empty, relative, or absolute)</li>
     *   <li>If the configured target path is absolute (e.g., {@code /tmp/custom}):