K castKey = (K) key;
        V value = getIfPresent(key);
        if (value != null) {
          result.put(castKey, value);
        }
      }
    }
    return ImmutableMap.copyOf(result);
  }

  /** @since 11.0 */
  @Override
  public void put(K key, V value) {
    throw new UnsupportedOperationException();
  }

  /** @since 12.0 */
  @Override

        }
      }
    }
  }

  /** Returns a new CharBuffer identical to buf, except twice the capacity. */
  private static CharBuffer grow(CharBuffer buf) {
    char[] copy = Arrays.copyOf(buf.array(), buf.capacity() * 2);
    CharBuffer bigger = CharBuffer.wrap(copy);
    Java8Compatibility.position(bigger, buf.position());
    Java8Compatibility.limit(bigger, buf.limit());
    return bigger;
  }

          entries.put(file, classloader);
        }
      }
    }
    return ImmutableMap.copyOf(entries);
  }

  private static ImmutableList<URL> getClassLoaderUrls(ClassLoader classloader) {
    if (classloader instanceof URLClassLoader) {
      return ImmutableList.copyOf(((URLClassLoader) classloader).getURLs());
    }
    if (classloader.equals(ClassLoader.getSystemClassLoader())) {

    // would cause one to be evicted.
    return new CacheBuilderFactory()
        .withKeyStrengths(ImmutableSet.of(Strength.STRONG, Strength.WEAK))
        .withValueStrengths(ImmutableSet.copyOf(Strength.values()))
        .withConcurrencyLevels(ImmutableSet.of(1, 4, 16, 64))
        .withMaximumSizes(ImmutableSet.of(400, 1000))
        .withInitialCapacities(ImmutableSet.of(0, 1, 10, 100, 1000))

      this.bytes = initialBytes.clone();
    }

    @Override
    public InputStream openStream() {
      return new In();
    }

    public void append(byte[] b) {
      byte[] newBytes = Arrays.copyOf(bytes, bytes.length + b.length);
      System.arraycopy(b, 0, newBytes, bytes.length, b.length);
      bytes = newBytes;
    }

    private class In extends InputStream {
      private int pos;

      }
      builder.duplicateKey = duplicateKey;
      hashTable = hashTableAndSizeAndDuplicate[0];
      n = (Integer) hashTableAndSizeAndDuplicate[1];
      alternatingKeysAndValues = Arrays.copyOf(alternatingKeysAndValues, n * 2);
    } else {
      hashTable = hashTablePlus;
    }
    return new RegularImmutableMap<K, V>(hashTable, alternatingKeysAndValues, n);
  }

  /**

   * @throws NullPointerException if any of {@code sources} is {@code null}
   * @since 15.0
   */
  public static ByteSource concat(Iterator<? extends ByteSource> sources) {
    return concat(ImmutableList.copyOf(sources));
  }

  /**
   * Concatenates multiple {@link ByteSource} instances into a single source. Streams returned from
   * the source will contain the concatenated data from the streams of the underlying sources.

   *     array}, plus {@code element} occupying the last position.
   */
  public static <T extends @Nullable Object> T[] concat(T[] array, @ParametricNullness T element) {
    T[] result = Arrays.copyOf(array, array.length + 1);
    result[array.length] = element;
    return result;
  }

  /**
   * Returns an array containing all of the elements in the specified collection; the runtime type

        filtered.forEach(
            (Integer i) -> {
              assertTrue("Unexpected element: " + i, EVEN.apply(i));
              foundElements.add(i);
            });
        assertEquals(ImmutableList.copyOf(filtered), foundElements);
      }
    }
  }

  public abstract static class AbstractFilteredCollectionTest<C extends Collection<Integer>>
      extends AbstractFilteredIterableTest<C> {

            newParams = rewriter.rewrite(newParams);
        }
        return newParams;
    }

    public void addRewriter(final SearchRequestParamsRewriter rewriter) {
        searchRequestParamsRewriters = Arrays.copyOf(searchRequestParamsRewriters, searchRequestParamsRewriters.length + 1);
        searchRequestParamsRewriters[searchRequestParamsRewriters.length - 1] = rewriter;
    }

    public interface SearchRequestParamsRewriter {