"12.1.9 UNIMPLEMENTED"
"12.2.1 UNIMPLEMENTED"
"12.2.10 UNIMPLEMENTED"
"12.2.11 UNIMPLEMENTED"
"12.2.12 UNIMPLEMENTED"
"12.2.13 UNIMPLEMENTED"
"12.2.14 UNIMPLEMENTED"
"12.2.15 UNIMPLEMENTED"
"12.2.16 UNIMPLEMENTED"
"12.2.17 UNIMPLEMENTED"
"12.2.18 UNIMPLEMENTED"
"12.2.2 UNIMPLEMENTED"
"12.2.3 UNIMPLEMENTED"
"12.2.4 UNIMPLEMENTED"
"12.2.5 UNIMPLEMENTED"
"12.2.6 UNIMPLEMENTED"
"12.2.7 UNIMPLEMENTED"
"12.2.8 UNIMPLEMENTED"

   * getAnnotatedBounds()} method, then its return type means it won't compile on Android, while if
   * we don't include the method, then the compiler will complain that an abstract method is
   * unimplemented. So instead we use a dynamic proxy to get an implementation. If the method being
   * called on the {@code TypeVariable} instance has the same name as one of the public methods of

   * getAnnotatedBounds()} method, then its return type means it won't compile on Android, while if
   * we don't include the method, then the compiler will complain that an abstract method is
   * unimplemented. So instead we use a dynamic proxy to get an implementation. If the method being
   * called on the {@code TypeVariable} instance has the same name as one of the public methods of

   * @return the converted instance; <b>must not</b> be null
   * @throws UnsupportedOperationException if backward conversion is not implemented; this should be
   *     very rare. Note that if backward conversion is not only unimplemented but
   *     unimplement<i>able</i> (for example, consider a {@code Converter<Chicken, ChickenNugget>}),
   *     then this is not logically a {@code Converter} at all, and should just implement {@link
   *     Function}.