DefineMap.keys should return serialize: true properties ~12

[justinbmeyer]

@justinbmeyer commented on Tue May 24 2016

From: canjs/canjs#2193

We probably want something similar for can-define/map/map.

[justinbmeyer]

DefineMap.extend({
  first: "string",
  last: "string",
  fullName: {
    get: function(){  return this.first  + ... },
    serialize: true
  }
})