code: public static <T extends MethodDescription> ElementMatcher.Junction<T> returnsGeneric(ElementMatcher<? super TypeDescription.Generic> matcher) {
          return new MethodReturnTypeMatcher<T>(matcher);
      }
docs: Matches {@link MethodDescription}s that match a matched method's return type.
  
  @param matcher A matcher to apply onto a matched method's return type.
  @param <T>     The type of the matched object.
  @return An element matcher that matches a given return type against another {@code matcher}.