context.logger.info(String.format(
                    "%s %s encountered while building the effective toolchains (use -e to see details)",
                    totalProblems, (totalProblems == 1) ? "problem was" : "problems were"));

            if (context.options().showErrors().orElse(false)) {
                for (BuilderProblem problem :
                        toolchainsResult.getProblems().problems().toList()) {

        if (validationReportLevel == ValidationReportLevel.NONE
                || validationReportLevel == ValidationReportLevel.INLINE) {
            return; // we were asked to not report anything OR reporting already happened inline
        }
        ConcurrentHashMap<String, PluginValidationIssues> issuesMap = pluginIssues(mavenSession.getRepositorySession());

  @SuppressWarnings("unchecked")
  public static <T extends @Nullable Object> Collector<T, ?, T> onlyElement() {
    return (Collector) ONLY_ELEMENT;
  }

  /**
   * This atrocity is here to let us report several of the elements in the stream if there were more
   * than one, not just two.
   */
  @SuppressWarnings("EmptyList") // ImmutableList doesn't support nullable element types
  private static final class ToOptionalState {

        }

    }

    /**
     * Returns the OpenSearch QueryBuilder for geographic queries.
     *
     * @return the QueryBuilder containing geo-distance queries, or null if no valid geo parameters were found
     */
    public QueryBuilder toQueryBuilder() {
        return builder;
    }

        List<MavenOptions> o = options.stream().filter(Objects::nonNull).toList();
        if (o.isEmpty()) {
            throw new IllegalArgumentException("No options specified (or all were null)");
        } else if (o.size() == 1) {
            return o.get(0);
        } else {
            return new LayeredMavenOptions<>(o);
        }
    }

    protected LayeredMavenOptions(List<O> options) {

     * track the problem back to its origin. A concrete example for such a source hint can be the file path or URL from
     * which the settings were read.
     *
     * @return the hint about the source of the problem or an empty string if unknown, never {@code null}
     */
    @Nonnull
    String getSource();

    /**

        with(standardError) {
            files.forEach {
                assertContains("API changes in file '${it.name}' should be in alphabetical order (by type and member), yet these changes were not:\n")
            }
            changes?.forEach { assertContains(it.toString()) }
            assertContains(cleanupHint)
        }
    }

    private
    fun StringWriter.assertContains(text: String) {

import java.util.Iterator;
import java.util.NoSuchElementException;

import org.codelibs.core.exception.ClUnsupportedOperationException;

/**
 * An {@link Iterator} that iterates over multiple {@link Iterator}s as if they were a single {@link Iterator}.
 * <p>
 * Usage example:
 * </p>
 *
 * <pre>
 * import static org.codelibs.core.collection.MultiIterator.*;
 *
 * List&lt;String&gt; list = ...;
 * Set&lt;String&gt; set = ...;

        // Ensure the AvPair's internal raw array is not affected (defensive copy not made)
        // This test assumes that the AvPair constructor does NOT make a defensive copy of the raw array.
        // If a defensive copy were made, this test would fail, and the behavior would be more robust.
        // Given the current implementation, direct modification of the passed array affects the AvPair.

   * array will contain only nulls.
   */
  E[] createArray(int length);

  /**
   * Returns the iteration ordering of elements, given the order in which they were added to the
   * container. This method may return the original list unchanged, the original list modified in
   * place, or a different list.
   *