Define or modify a property with @property_name in object referenced by @value. This is equivalent to JavaScript <function>Object.defineProperty()</function> when used with a data descriptor.
the name of the property to define
#JSCValuePropertyFlags
the default property value
See Implementation
Define or modify a property with @property_name in object referenced by @value. This is equivalent to JavaScript <function>Object.defineProperty()</function> when used with a data descriptor.