*       the same.
   *   <li>The special characters ".", "-", "*", and "_" remain the same.
   *   <li>The space character " " is converted into a plus sign "+".
   *   <li>All other characters are converted into one or more bytes using UTF-8 encoding and each
   *       byte is then represented by the 3-character string "%XY", where "XY" is the two-digit,
   *       uppercase, hexadecimal representation of the byte value.
   * </ul>
   *

@ElementTypesAreNonnullByDefault
public final class Utf8 {
  /**
   * Returns the number of bytes in the UTF-8-encoded form of {@code sequence}. For a string, this
   * method is equivalent to {@code string.getBytes(UTF_8).length}, but is more efficient in both
   * time and space.
   *
   * @throws IllegalArgumentException if {@code sequence} contains ill-formed UTF-16 (unpaired
   *     surrogates)
   */

 * Google-internal Android suite generators. Note that those generators also suppress any test
 * annotated with MediumTest or LargeTest.
 *
 * <p>For more discussion, see {@linkplain com.google.common.base.AndroidIncompatible the
 * documentation on another copy of this annotation}.
 */
@Retention(CLASS)
@Target({ANNOTATION_TYPE, CONSTRUCTOR, FIELD, METHOD, TYPE})
@GwtCompatible

 * Google-internal Android suite generators. Note that those generators also suppress any test
 * annotated with MediumTest or LargeTest.
 *
 * <p>For more discussion, see {@linkplain com.google.common.base.AndroidIncompatible the
 * documentation on another copy of this annotation}.
 */
@Retention(CLASS)
@Target({ANNOTATION_TYPE, CONSTRUCTOR, FIELD, METHOD, TYPE})
@GwtCompatible

 * Google-internal Android suite generators. Note that those generators also suppress any test
 * annotated with MediumTest or LargeTest.
 *
 * <p>For more discussion, see {@linkplain com.google.common.base.AndroidIncompatible the
 * documentation on another copy of this annotation}.
 */
@Retention(CLASS)
@Target({ANNOTATION_TYPE, CONSTRUCTOR, FIELD, METHOD, TYPE})
@GwtCompatible

import com.google.common.annotations.GwtCompatible;
import java.util.concurrent.Future;
import org.checkerframework.checker.nullness.qual.Nullable;

/**
 * Computes a value, possibly asynchronously. For an example usage and more information, see {@link
 * Futures.FutureCombiner#callAsync(AsyncCallable, java.util.concurrent.Executor)}.
 *
 * <p>Much like {@link java.util.concurrent.Callable}, but returning a {@link ListenableFuture}
 * result.
 *

import com.google.common.annotations.GwtCompatible;
import java.util.concurrent.Future;
import org.checkerframework.checker.nullness.qual.Nullable;

/**
 * Transforms a value, possibly asynchronously. For an example usage and more information, see
 * {@link Futures#transformAsync(ListenableFuture, AsyncFunction, Executor)}.
 *
 * @author Chris Povirk
 * @since 11.0
 */
@GwtCompatible
@ElementTypesAreNonnullByDefault

 * Google-internal Android suite generators. Note that those generators also suppress any test
 * annotated with MediumTest or LargeTest.
 *
 * <p>For more discussion, see {@linkplain com.google.common.base.AndroidIncompatible the
 * documentation on another copy of this annotation}.
 */
@Retention(CLASS)
@Target({ANNOTATION_TYPE, CONSTRUCTOR, FIELD, METHOD, TYPE})
@GwtCompatible

 * Google-internal Android suite generators. Note that those generators also suppress any test
 * annotated with MediumTest or LargeTest.
 *
 * <p>For more discussion, see {@linkplain com.google.common.base.AndroidIncompatible the
 * documentation on another copy of this annotation}.
 */
@Retention(CLASS)
@Target({ANNOTATION_TYPE, CONSTRUCTOR, FIELD, METHOD, TYPE})
@GwtCompatible

 * Google-internal Android suite generators. Note that those generators also suppress any test
 * annotated with MediumTest or LargeTest.
 *
 * <p>For more discussion, see {@linkplain com.google.common.base.AndroidIncompatible the
 * documentation on another copy of this annotation}.
 */
@Retention(CLASS)
@Target({ANNOTATION_TYPE, CONSTRUCTOR, FIELD, METHOD, TYPE})
@GwtCompatible