js/libs/ember-data.js
function(store, type, payload) {
    if (payload && payload.meta) {
      store.metaForType(type, payload.meta);
      delete payload.meta;
    }
  }
function(store, type, payload) {
    if (payload && payload.meta) {
      store.metaForType(type, payload.meta);
      delete payload.meta;
    }
  }
`extractMeta` is used to deserialize any meta information in the
adapter payload. By default Ember Data expects meta information to
be located on the `meta` property of the payload object.

Example

```javascript
App.PostSerializer = DS.JSONSerializer.extend({
extractMeta: function(store, type, payload) {
if (payload && payload._pagination) {
store.metaForType(type, payload._pagination);
delete payload._pagination;
}
}
});
```

@method extractMeta
@param {DS.Store} store
@param {subclass of DS.Model} type
@param {Object} payload