+@property (readonly) BOOL isObject;
+
+/*!
+@method
+@abstract Check if a JSValue is an array.
+*/
+@property (readonly) BOOL isArray NS_AVAILABLE(10_11, 9_0);
+
+/*!
+@method
+@abstract Check if a JSValue is a date.
+*/
+@property (readonly) BOOL isDate NS_AVAILABLE(10_11, 9_0);