code: function getSerializer(type, subtype)
  {
      if (Array.isArray(type))
          return compositeSerializer(_.map(type, function(value) { return getSerializer(value, subtype); }));
  
      return function serializer(val)
      {
          return Serializers[type.replace(/^\s+|\s+$/g,'')](val, subtype);
      };
  }
docs: Gets the serializer(s) for a specific type
  @private
  @memberOf Marshal