lerp method

Implementation

FlyBreakpointToken lerp(FlyBreakpointToken other, double t) {
  final result = <String, double>{};
  final allKeys = {..._allValues.keys, ...other._allValues.keys};

  for (final key in allKeys) {
    final valueA = _allValues[key];
    final valueB = other._allValues[key];
    final numA = valueA ?? 0.0;
    final numB = valueB ?? 0.0;
    result[key] = numA + (numB - numA) * t;
  }

  return FlyBreakpointToken(
    sm: result['sm']!,
    md: result['md']!,
    lg: result['lg']!,
    xl: result['xl']!,
    xl2: result['xl2']!,
    extras: Map.fromEntries(
      result.entries.where(
        (e) => !['sm', 'md', 'lg', 'xl', 'xl2'].contains(e.key),
      ),
    ),
  );
}