* the fact that the problem reporter has/should not have information about the calling context and hence cannot provide
 * an expressive source hint for the model problem. Instead, the source hint is configured by the model builder before
 * it delegates to other components that potentially encounter problems. Then, the problem reporter can focus on

                Map<Object, Object> context) {
            List<ReportSet> src = source.getReportSets();
            if (!src.isEmpty()) {
                List<ReportSet> tgt = target.getReportSets();
                Map<Object, ReportSet> merged = new LinkedHashMap<>((src.size() + tgt.size()) * 2);

                for (ReportSet element : tgt) {
                    Object key = getReportSetKey().apply(element);

        <field>
          <name>requiresReports</name>
          <version>1.0.0</version><!-- no longer part of 1.1.0 -->
          <type>boolean</type>
          <description>Flags this Mojo to require running inside of a reports context. Unsupported since Maven 3.0.</description>
          <defaultValue>false</defaultValue>
        </field>
        <field>
          <name>requiresOnline</name>
          <version>1.0.0/1.1.0</version>

 * the fact that the problem reporter has/should not have information about the calling context and hence cannot provide
 * an expressive source hint for the model problem. Instead, the source hint is configured by the model builder before
 * it delegates to other components that potentially encounter problems. Then, the problem reporter can focus on

            boolean sourceDominant,
            Map<Object, Object> context) {
        List<ReportSet> src = source.getReportSets();
        if (!src.isEmpty()) {
            List<ReportSet> tgt = target.getReportSets();
            Map<Object, ReportSet> merged = new LinkedHashMap<>((src.size() + tgt.size()) * 2);

            for (ReportSet rset : src) {

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<>();

                                    // in ITs test we need only reports from test itself
                                    // test projects can contain reports with tested failed builds
                                    junit testResults: '**/core-it-suite/target/surefire-reports/*.xml,**/core-it-support/**/target/surefire-reports/*.xml', allowEmptyResults: true

    void testMirrorStopOnFirstMatch() {
        // exact matches win first
        Mirror mirrorA2 = newMirror("a2", "a,b", "http://a2");
        Mirror mirrorA = newMirror("a", "a", "http://a");
        // make sure repeated entries are skipped
        Mirror mirrorA3 = newMirror("a", "a", "http://a3");

        Mirror mirrorB = newMirror("b", "b", "http://b");
        Mirror mirrorC = newMirror("c", "d,e", "http://de");

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