code: static <S,T> TypeAdapter<S,T> createAdapter(Class<? extends S> sourceType, Class<? extends T> targetType) {
  		return doCreateAdapter(targetType,AdapterMethodValidator.newInstance(targetType, sourceType));
  	}
docs: Get an adapter capable of transforming instances of a source type into
  instances of a target type.
  
  @param sourceType
  The type of the instances that the adapter should be able to
  transform.
  @param targetType
  The type of instances that the adapter should be able to
  create.
  @return An adapter capable of transforming instances of the {@code sourceType}
  into instances of the {@code targetType}.
  @throws CannotAdaptClassesException
  when no adapter capable of carrying out such transformation
  is available.