code: function(_raw, _mask) {
        try {
          packerCache.prepare();
          _raw = this.$type.unpack(this, _raw);
          return this.$decode(_raw, _mask);
        } finally {
          packerCache.clear();
        }
      }
docs: / Misc common methods 
  @memberof ExtendedApi#
  
  @description
  
  Unpacks and decode raw data from a server generated structure.
  
  ATTENTION: do not override this method to change the object wrapping strategy,
  instead, override the static {@link Model.$unpack} method.
  
  @param  {mixed} _raw Raw server data
  @param  {string} _mask 'CRU' mask
  @return {ExtendedApi} this