Method toMap

guava/src/com/google/common/collect/Maps.java:1255–1258

Returns an immutable map whose keys are the distinct elements of {@code keys} and whose value for each key was computed by {@code valueFunction}. The map's iteration order is the order of the first appearance of each key in {@code keys}. <p>When there are multiple instances of a key in {@code keys}

(
      Iterable<K> keys, Function<? super K, V> valueFunction)

   * @since 14.0
   */
  public static <K, V> ImmutableMap<K, V> toMap(
      Iterable<K> keys, Function<? super K, V> valueFunction) {
    return toMap(keys.iterator(), valueFunction);
  }

  /**
   * Returns an immutable map whose keys are the distinct elements of {@code keys} and whose value