+ " is missing.",
                    dependency.getLocation(""));
            return null;
        }

        String imported = groupId + ':' + artifactId + ':' + version;

        if (importIds.contains(imported)) {
            StringBuilder message =
                    new StringBuilder("The dependencies of type=pom and with scope=import form a cycle: ");

            PluginDescriptor pluginDescriptor = null;
            if (plugin.isExtensions() && !artifacts.isEmpty()) {
                // ignore plugin descriptor parsing errors at this point
                // these errors will reported during calculation of project build execution plan
                try {
                    pluginDescriptor = extractPluginDescriptor(artifacts.get(0), plugin);

                        problems.add(
                                Severity.WARNING,
                                Version.V40,
                                "Ignored POM import for: " + toString(dependency) + " as already imported "
                                        + toString(present) + ".  Add a the conflicting managed dependency directly "
                                        + "to the dependencyManagement section of the POM.");

        try {
            return expressionEvaluator.evaluate(strValue) != null;
        } catch (ExpressionEvaluationException e) {
            // not important
            // will be reported during Mojo fields populate
        }

        // fallback - in case of error in expressionEvaluator
        return false;
    }

    @Override
    public final void validate(

    -->
    <prop1><!-- X -->That's<!-- X --> <!-- X -->a<!-- X --> <!-- X -->test!<!-- X --></prop1>

    <!--
    This checks the coalescing of CHARACTERS events which would otherwise be reported in chunks of the internal parser
    buffer size (usually 4 or 8 KB). The text block is designed such that its length is exactly 32 KB after leading

                .filter(rap -> !allAvailableProfiles.contains(rap))
                .collect(toSet());

        if (!notFoundRequiredProfiles.isEmpty()) {
            // Use SLF4J formatter for consistency with warnings reported by logger
            final String message = MessageFormatter.format(
                            "The requested profiles {} could not be activated or deactivated because they do not"

         * <p>
         * Note: if a reactor build contains a plugin (with issues) and later that built plugin is used in build,
         * it will be reported as "external". It is up to developer to correctly interpret output (GAV) of issues
         * and realize that in this case he wears two hats:" "user" and "(plugin) developer".
         */
        EXTERNAL
    }

    /**

import java.util.Set;
import java.util.concurrent.ConcurrentHashMap;

import org.apache.maven.api.model.Model;

/**
 * Holds all Models that are known to the reactor. This allows the project builder to resolve imported Models from the
 * reactor when building another project's effective model.
 *
 */
class ReactorModelPool {
    private final Map<GAKey, Set<Model>> modelsByGa = new ConcurrentHashMap<>();

  <version>0.1</version>
  <packaging>pom</packaging>

  <!--
  NOTE: This extends the test to check an edge case of URL adjustment which must not error out during inheritance
  if the child misses the artifactId (as to be reported by validation).
  -->
  <url>https://maven.apache.org/</url>

                            errOn30,
                            Version.V20,
                            prefix + prefix2 + "classifier",
                            key,
                            "must be empty, imported POM cannot have a classifier.",
                            dependency);
                }
            } else if ("system".equals(dependency.getScope())) {