guava/src/com/google/common/collect/ImmutableBiMapFauxverideShim.java
@Deprecated
  public static <T, K, V> Collector<T, ?, ImmutableMap<K, V>> toImmutableMap(
      Function<? super T, ? extends K> keyFunction,
      Function<? super T, ? extends V> valueFunction) {
    throw new UnsupportedOperationException();
  }
@Deprecated
  public static <T, K, V> Collector<T, ?, ImmutableMap<K, V>> toImmutableMap(
      Function<? super T, ? extends K> keyFunction,
      Function<? super T, ? extends V> valueFunction) {
    throw new UnsupportedOperationException();
  }
@ Deprecated public static < T , K , V > Collector < T , ? , ImmutableMap < K , V > > toImmutableMap ( Function < ? super T , ? extends K > keyFunction , Function < ? super T , ? extends V > valueFunction ) { throw new UnsupportedOperationException ( ) ; }
Not supported. Use {@link ImmutableBiMap#toImmutableBiMap} instead. This method exists only to
hide {@link ImmutableMap#toImmutableMap(Function, Function)} from consumers of {@code
ImmutableBiMap}.

@throws UnsupportedOperationException always
@deprecated Use {@link ImmutableBiMap#toImmutableBiMap}.
Not supported . Use { @link ImmutableBiMap#toImmutableBiMap } instead . This method exists only to hide { @link ImmutableMap#toImmutableMap ( Function Function ) } from consumers of { @code ImmutableBiMap } .