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:     0xa620, 0xa8d0, 0xa900, 0xa9d0, 0xaa50, 0xabf0, 0xff10,
      0x104a0, 0x11066, 0x110f0, 0x11136, 0x111d0, 0x116c0]);
  
  class Character implements Comparable, Enumerable {
    $dart$core.int _value;
  
    Character(Character character) {
  