* Color red = new Color("red", 255, 0, 0);
   * ...
   * FluentIterable<Color> allColors = FluentIterable.from(ImmutableSet.of(red, green, blue));
   *
   * Map<String, Color> colorForName = allColors.uniqueIndex(toStringFunction());
   * assertThat(colorForName).containsEntry("red", red);
   * }
   *
   * <p>If your index may associate multiple values with each key, use {@link #index(Function)
   * index}.
   *

   * Color red = new Color("red", 255, 0, 0);
   * ...
   * FluentIterable<Color> allColors = FluentIterable.from(ImmutableSet.of(red, green, blue));
   *
   * Map<String, Color> colorForName = allColors.uniqueIndex(toStringFunction());
   * assertThat(colorForName).containsEntry("red", red);
   * }
   *
   * <p>If your index may associate multiple values with each key, use {@link #index(Function)
   * index}.
   *

   * Color red = new Color("red", 255, 0, 0);
   * ...
   * Iterator<Color> allColors = ImmutableSet.of(red, green, blue).iterator();
   *
   * Map<String, Color> colorForName = uniqueIndex(allColors, toStringFunction());
   * assertThat(colorForName).containsEntry("red", red);
   * }
   *
   * <p>If your index may associate multiple values with each key, use {@link
   * Multimaps#index(Iterator, Function) Multimaps.index}.

   * Color red = new Color("red", 255, 0, 0);
   * ...
   * Iterator<Color> allColors = ImmutableSet.of(red, green, blue).iterator();
   *
   * Map<String, Color> colorForName = uniqueIndex(allColors, toStringFunction());
   * assertThat(colorForName).containsEntry("red", red);
   * }
   *
   * <p>If your index may associate multiple values with each key, use {@link
   * Multimaps#index(Iterator, Function) Multimaps.index}.