old_contents: import DS from 'ember-data';
  
  export default DS.Transform.extend({
    deserialize: function(serialized) {
      var map = {
        32: 'Chorus',
        41: 'Quartet',
        42: 'Mixed',
      };
      return map[serialized];
    },
  
    serialize: function(deserialized) {
      var map = {
        'Chorus': 32,
        'Quartet': 41,
        'Mixed': 42,
      };
      return map[deserialized];
    }
  });
  
new_contents: import DS from 'ember-data';
  
  export default DS.Transform.extend({
    deserialize: function(serialized) {
      var map = {
        32: 'Chorus',
        41: 'Quartet',
        42: 'Mixed',
        43: 'Senior',
        44: 'Youth',
        45: 'Unknown',
      };
      return map[serialized];
    },
  
    serialize: function(deserialized) {
      var map = {
        'Chorus': 32,
        'Quartet': 41,
        'Mixed': 42,
        'Senior': 43,
        'Youth': 44,
        'Unknown': 45,
      };
      return map[deserialized];
    }
  });
  
subject: Update app/transforms/session-kind.js