List<String> features = [
    'Cartoon Multiverse',
    'Pet Avatar',
    'My Sketch',
    '3D Cartoon',
    'Be a Star',
    'Renaissance',
    'Beauty Painting',
    '2D Cartoon',
  ];
  final Map<String, List<String>> subfeatures = {
    'Cartoon Multiverse': [
      'Cartoon 3D',
      'Fantasy',
      'Pastel Crayon',
      'Oil Painting',
      'Pencil Sketch',
      'Watercolor',
      '18th Century',
      'Doll Art',
      'Cartoon 2D',
      'Anime',
      'Royal 3D',
      'Pop Art',
      'Toys',
      'Funny 3D',
      'Frozen 3D',
      'Baby 3D',
      'Renaissance',
      'Villain 3D',
    ],
    'Pet Avatar': [
      'Natural',
      '3D Cartoon',
      'Classic Cartoon',
      'Wool Doll',
      'Cute Game',
      'Top Bricks',
      '3D',
      'Watercolor',
      'Kawaii Art',
      'Digital Art',
      'Toys',
    ],
    'My Sketch': [
      'Pencil Sketch',
      'Pencil Multiple',
      'Portrait Multiple',
    ],
    '3D Cartoon': [
      'Royalty 3D',
      'Funny 3D',
      'Cartoon 3D',
      'Baby 3D',
      'Villain 3D',
      'Baby Villain 3D',
    ],
    'Be a Star': [
      'Movie Star',
      'Supermodel',
      'Old Holywood',
    ],
    'Renaissance': [
      '15th Century',
      '18th Century',
      '20th Century',
    ],
    'Beauty Painting': [
      'Natural Art',
      'Royalty Art',
      'Fantasy Art',
    ],
    '2D Cartoon': [
      'Royalty 2D',
      'Baby 2D',
      'Cartoon 2D',
    ],
  };