anchor.diff:    String uri;
   
     /**
  -   * Offset of the "import" keyword.  Zero for implicit imports.
  -   *
  -   * Note that explicit imports may also have an offset of zero.  To
  -   * distinguish explicit from implicit imports, look for the presence of the
  -   * [IMPLICIT] flag.
  +   * If [isImplicit] is false, offset of the "import" keyword.  If [isImplicit]
  +   * is true, zero.
      */
     @informative
     int offset;
  
positive.code:    * Name of the enumerated value.
     */
    String name;
  }
  
  /**
  
negative.code:    */
    List<UnlinkedExecutable> executables;
  
    /**
     * Indicates whether the class is declared with the `abstract` keyword.
     */
    bool isAbstract;
  
    /**
     * Indicates whether the class is declared using mixin application syntax.
     */
    bool isMixinApplication;
  }
  
  /**
  