private final BiMap<A, B> bimap;

    BiMapConverter(BiMap<A, B> bimap) {
      this.bimap = checkNotNull(bimap);
    }

    @Override
    protected B doForward(A a) {
      return convert(bimap, a);
    }

    @Override
    protected A doBackward(B b) {
      return convert(bimap.inverse(), b);
    }

    private static <X, Y> Y convert(BiMap<X, Y> bimap, X input) {

    private final BiMap<A, B> bimap;

    BiMapConverter(BiMap<A, B> bimap) {
      this.bimap = checkNotNull(bimap);
    }

    @Override
    protected B doForward(A a) {
      return convert(bimap, a);
    }

    @Override
    protected A doBackward(B b) {
      return convert(bimap.inverse(), b);
    }

    private static <X, Y> Y convert(BiMap<X, Y> bimap, X input) {

          <version>3.0.0+</version>
          <description>
            <![CDATA[
            The URL to the project's homepage.
            <p><b>Default value is</b>: parent value [+ path adjustment] + (artifactId or project.directory property), or just parent value if
            project's {@code child.project.url.inherit.append.path="false"}</p>
            ]]>
          </description>
          <type>String</type>

    }

    @Override
    public Iterator<ReferenceEntry<K, V>> iterator() {
      return new AbstractSequentialIterator<ReferenceEntry<K, V>>(peek()) {
        @CheckForNull
        @Override
        protected ReferenceEntry<K, V> computeNext(ReferenceEntry<K, V> previous) {
          ReferenceEntry<K, V> next = previous.getNextInWriteQueue();
          return (next == head) ? null : next;
        }
      };
    }

    }

    @Override
    public Iterator<ReferenceEntry<K, V>> iterator() {
      return new AbstractSequentialIterator<ReferenceEntry<K, V>>(peek()) {
        @CheckForNull
        @Override
        protected ReferenceEntry<K, V> computeNext(ReferenceEntry<K, V> previous) {
          ReferenceEntry<K, V> next = previous.getNextInWriteQueue();
          return (next == head) ? null : next;
        }
      };
    }

    when (responseCode) {
      HttpURLConnection.HTTP_PROXY_AUTH -> {
        builder.addHeader("Proxy-Authenticate: Basic realm=\"protected area\"")
      }

      HttpURLConnection.HTTP_UNAUTHORIZED -> {
        builder.addHeader("WWW-Authenticate: Basic realm=\"protected area\"")
      }

      HttpURLConnection.HTTP_NO_CONTENT, HttpURLConnection.HTTP_RESET -> {

       */
      ClosingFuture<V> call(DeferredCloser closer, Peeker peeker) throws Exception;
    }

    private final boolean allMustSucceed;
    protected final ImmutableList<ClosingFuture<?>> inputs;

    private Combiner(boolean allMustSucceed, Iterable<? extends ClosingFuture<?>> inputs) {
      this.allMustSucceed = allMustSucceed;

       */
      ClosingFuture<V> call(DeferredCloser closer, Peeker peeker) throws Exception;
    }

    private final boolean allMustSucceed;
    protected final ImmutableList<ClosingFuture<?>> inputs;

    private Combiner(boolean allMustSucceed, Iterable<? extends ClosingFuture<?>> inputs) {
      this.allMustSucceed = allMustSucceed;

#include "mlir/IR/MLIRContext.h"  // from @llvm-project
#include "mlir/IR/OpDefinition.h"  // from @llvm-project
#include "mlir/IR/SymbolTable.h"  // from @llvm-project
#include "mlir/IR/Types.h"  // from @llvm-project
#include "mlir/IR/Verifier.h"  // from @llvm-project
#include "mlir/IR/Visitors.h"  // from @llvm-project
#include "mlir/Pass/PassManager.h"  // from @llvm-project
#include "mlir/Support/LLVM.h"  // from @llvm-project

        new ForwardingListenableFuture<String>() {
          final ListenableFuture<String> delegate = immediateFuture("Should never be seen");

          @Override
          protected ListenableFuture<String> delegate() {
            return delegate;
          }

          @Override
          public String get() {
            throw new RuntimeException();
          }