code: function (value) {
          var handler = Variable.types[this.type] || Variable.types.any;
          return _.isFunction(handler) ? handler(value) : handler.in(value);
      }
docs: Typecasts a value to the {@link Variable.types} of this {@link Variable}. Returns the value of the variable
  converted to the type specified in {@link Variable#type}.
  
  @private
  @param {*} value
  @returns {*}