anchor.diff:     * @return the inherited executable element with the member name, or `null` if no such
      *         member exists
      */
  -  @deprecated
  +  @Deprecated('Use InheritanceManager2.getMember() instead.')
     ExecutableElement lookupMember(ClassElement classElt, String memberName) {
       ExecutableElement element = _lookupMemberInClass(classElt, memberName);
       if (element != null) {
  
positive.code:  * Instances of the class `InheritanceManager` manage the knowledge of where class members
   * (methods, getters & setters) are inherited from.
   */
  class InheritanceManager {
    /**
     * The [LibraryElement] that is managed by this manager.
  
negative.code:    * @param memberName the name of the class member to query
     * @return a list of overridden methods
     */
    @Deprecated('Use InheritanceManager2.getOverridden() instead.')
    List<ExecutableElement> lookupOverrides(
        ClassElement classElt, String memberName) {
      List<ExecutableElement> result = new List<ExecutableElement>();
  