anchor.diff:  
     /**
      * Returns the positive integer represented by the byte at the specified
  -   * [byteOffset] in this object, in unsigned binary form. The
  -   * return value will be between 0 and 255, inclusive.
  +   * [byteOffset] in this object, in unsigned binary form.
  +   *
  +   * The return value will be between 0 and 255, inclusive.
      *
      * Throws [RangeError] if [byteOffset] is negative, or
      * greater than or equal to the length of this object.
  
positive.code:   /**
     * Sets the eight bytes starting at the specified [byteOffset] in this object
     * to the unsigned binary representation of the specified [value],
     * which must fit in eight bytes. in other words, [value] must be between
     * 0 and 2<sup>64</sup> - 1, inclusive.
     *
     * Throws [RangeError] if [byteOffset] is negative, or
  
negative.code: 
  /**
   * A fixed-length list of Float64x2 numbers that is viewable as a
   * [TypedData].
   *
   * For long lists, this implementation will be considerably more
   * space- and time-efficient than the default [List] implementation.
   */
  abstract class Float64x2List implements List<Float64x2>, TypedData {
  