anchor.diff:    static const sNaNmax = 0x7FFFBFFFFFFFFFFF;
     static const maxShortLength = kMaxShortLengthInBytes - sizeInBytes;
     static const maxLongLength = kMaxLongLengthInBytes - sizeInBytes;
  -  static final Float64List emptyList = new Float64List(0);
  + //Flush static final Float64List emptyList = new Float64List(0);
   
     static bool inRange(double val) => (val >= min) && (val <= max);
   
  
positive.code: 
    /// Returns a [values] if all values are valid Uint32, otherwise null.
    @deprecated
    static Float32List validate(Float32List values) {
      if ((values == null) || (values.length == 0)) return emptyList;
      return Float.listGuard(values, inRange);
    }
  
    /// Returns it argument [vList] if valid; otherwise, returns [null].
    static List<double> listGuard(List<double> vList) {
      if (vList == null || vList.length == 0) return emptyList;
      return Float.listGuard(vList, inRange);
    }
  
  
negative.code: 
    /// Returns a [values] if all values are valid Uint32, otherwise null.
    @deprecated
    static Float64List validate(Float64List values) => listGuard(values);
  
    /// Returns it argument [values] if valid; otherwise, returns [null].
    static List<double> listGuard(List<double> values) {
      if (values == null || values.length == 0) throw "invalid Float64: $values";
      //return Float.listGuard(vList, inRange);
      return values;
    }
    /// Returns a [true] if all values are valid Uint32, otherwise [false].
    static bool isValidList(List<double> vList) =>
  