setPrivate method
Sets a pointer to private data on an object.
The default object class does not allocate storage for private data. Only objects created with a non-NULL JSClass can store private data.
data
(void*) A void* to set as the object's private data.
Implementation
bool setPrivate(Pointer data) {
return JSObjectRef.jSObjectSetPrivate(pointer, data) == 1;
}