android/guava/src/com/google/common/collect/ImmutableSortedMapFauxverideShim.java
@Deprecated
  public static <K, V> ImmutableSortedMap<K, V> of(K k1, V v1) {
    throw new UnsupportedOperationException();
  }
@Deprecated
  public static <K, V> ImmutableSortedMap<K, V> of(K k1, V v1) {
    throw new UnsupportedOperationException();
  }
Not supported. <b>You are attempting to create a map that may contain a non-{@code Comparable}
key.</b> Proper calls will resolve to the version in {@code ImmutableSortedMap}, not this dummy
version.

@throws UnsupportedOperationException always
@deprecated <b>Pass a key of type {@code Comparable} to use {@link
ImmutableSortedMap#of(Comparable, Object)}.</b>