anchor.diff:  abstract class Float64x2List implements List<Float64x2>, TypedData {
     /**
      * Creates a [Float64x2List] of the specified length (in elements),
  -   * all of whose elements are initially zero.
  +   * all of whose elements have all lanes set to zero.
      */
     external factory Float64x2List(int length);
   
     /**
  -   * Creates a [Float64x2List] with the same size as the [elements] list
  +   * Creates a [Float64x2List] with the same length as the [elements] list
      * and copies over the elements.
      */
     external factory Float64x2List.fromList(List<Float64x2> elements);
  
positive.code:    * the length of [buffer].
     *
     * Throws [ArgumentError] if [offsetInBytes] is not a multiple of
     * BYTES_PER_ELEMENT.
     */
    external factory Uint32List.view(ByteBuffer buffer,
                                     [int offsetInBytes = 0, int length]);
  
negative.code:    * the length of [buffer].
     *
     * Throws [ArgumentError] if [offsetInBytes] is not a multiple of
     * [BYTES_PER_ELEMENT].
     */
    external factory Float64List.view(ByteBuffer buffer,
                                      [int offsetInBytes = 0, int length]);
  