public ArtifactResolutionRequest setCollectionFilter(ArtifactFilter filter) {
        this.collectionFilter = filter;

        return this;
    }

    /**
     * Gets the artifact filter that controls downloading of artifact files. This filter operates on those artifacts
     * that have been included by the {@link #getCollectionFilter()}.
     *

  @Override
  Iterable<Integer> createUnfiltered(Iterable<Integer> contents) {
    return Lists.newArrayList(contents);
  }

  @Override
  Iterable<Integer> filter(Iterable<Integer> elements, Predicate<? super Integer> predicate) {
    return Iterables.filter(elements, predicate);
  }

	clusterConfigCmd.PersistentFlags().StringVar(&fqdn, "fqdn", "", "Filter clusters by substring of Service FQDN field")
	clusterConfigCmd.PersistentFlags().StringVar(&direction, "direction", "", "Filter clusters by Direction field")
	clusterConfigCmd.PersistentFlags().StringVar(&subset, "subset", "", "Filter clusters by substring of Subset field")
	clusterConfigCmd.PersistentFlags().IntVar(&port, "port", 0, "Filter clusters by Port field")

func (c *ConfigWriter) PrintRouteSummary(filter RouteFilter) error {
	w, routes, err := c.setupRouteConfigWriter()
	if err != nil {
		return err
	}
	if filter.Verbose {
		fmt.Fprintln(w, "NAME\tVHOST NAME\tDOMAINS\tMATCH\tVIRTUAL SERVICE")
	} else {
		fmt.Fprintln(w, "NAME\tVIRTUAL HOSTS")
	}
	for _, route := range routes {
		if filter.Verify(route) {
			if includeConfigType {

                            .filter(StringUtil::isNotBlank).distinct().toArray(n -> new String[n]));
                    final String[] labels = split(getValue(list, 3), ",")
                            .get(stream -> stream.filter(StringUtil::isNotBlank).distinct().toArray(n -> new String[n]));

import org.apache.maven.artifact.resolver.ResolutionListenerForDepMgmt;
import org.apache.maven.artifact.resolver.ResolutionNode;
import org.apache.maven.artifact.resolver.filter.AndArtifactFilter;
import org.apache.maven.artifact.resolver.filter.ArtifactFilter;
import org.apache.maven.artifact.versioning.ArtifactVersion;
import org.apache.maven.artifact.versioning.ManagedVersionMap;

	return "more than one prefix in filter rule"
}

// ErrFilterNameSuffix - more than one suffix usage error.
type ErrFilterNameSuffix struct{}

func (err ErrFilterNameSuffix) Error() string {
	return "more than one suffix in filter rule"
}

// ErrInvalidFilterValue - invalid filter value error.
type ErrInvalidFilterValue struct {
	FilterValue string
}

        @SuppressWarnings("unchecked")
        Entry<String, Integer> entry = (Entry<String, Integer>) o;
        multimap.put(entry.getKey(), entry.getValue());
      }
      return filter(multimap);
    }

    abstract ListMultimap<String, Integer> filter(ListMultimap<String, Integer> multimap);

    @Override
    public Collection<Integer> createCollection(Iterable<? extends Integer> values) {
      return Lists.newArrayList(values);

            val dirPath = dir.toPath()
            Files.walk(dirPath).use { paths ->
                paths.filter { !it.toFile().isDirectory }
                    .limit(4)
                    .map { dirPath.relativize(it).toString() }
                    .collect(Collectors.toList())
            }
        }?.filter {
            it.value.isNotEmpty()
        } ?: emptyMap()

    /**

     * Note that this node will not be filtered and only the children
     * and its descendant will be checked.
     *
     * @param filter the filter to apply
     * @return a new filtered graph
     */
    @Nonnull
    Node filter(@Nonnull Predicate<Node> filter);

    /**
     * Returns a string representation of this dependency node.
     *
     * @return the string representation
     */
    @Nonnull