Method toMap

guava/src/com/google/common/collect/FluentIterable.java:704–707

Returns an immutable map whose keys are the distinct elements of this {@code FluentIterable} 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 this iterable. <p>When there are multiple instances of a key

(Function<? super E, V> valueFunction)

   * @since 14.0
   */
  @SuppressWarnings("nullness") // Unsafe, but we can't do much about it now.
  public final <V> ImmutableMap<@NonNull E, V> toMap(Function<? super E, V> valueFunction) {
    return Maps.toMap((Iterable<@NonNull E>) getDelegate(), valueFunction);
  }

  /**
   * Creates an index {@code ImmutableListMultimap} that contains the results of applying a