anchor.diff:  
     $dart$core.int get hashCode => _value.hashCode;
   
  +  $dart$core.bool get positive => _value > 0.0;
  +  $dart$core.bool get negative => _value < 0.0;
  +  $dart$core.Object get fractionalPart => new Float(_value.remainder(1));
  +  $dart$core.Object get wholePart => new Integer(_value.floor());
  +
     // Comparable
     Comparison compare([Float other])
         =>  _value < other._value ? smaller : (_value > other._value ? larger : equal);
  
positive.code: 
    Character get lowercased => new Character.$fromInt(toString().toLowerCase().runes.elementAt(0));
  
    // Comparable
    @$dart$core.override
    Comparison compare([Character other])
  
negative.code:   Integer get successor => new Integer(this._value + 1);
  
    // Comparable
    Comparison compare([Integer other])
        =>  _value < other._value ? smaller : (_value > other._value ? larger : equal);
  
    //Comparison compare(Integer other);
  