I am trying to use JSObjectSetPrivate to set private data for a JavaScript object in JavaScriptCore using Nim. However, the function call JSObjectSetPrivate(constructor, castpointer) always returns false, indicating a failure.

`
proc createClass*(ctx: JSContextRef) =
var classDef = JSClassDefinition(
attributes: kJSClassAttributeNone,
className: “myClass”
)

let classRef = JSClassCreate(addr classDef)
assert(classRef != nil) # Ensure classRef is valid

let prototype = JSObjectCreate(ctx, classRef, nil)
assert(prototype != nil) # Ensure prototype is valid

let constructor = JSObjectMakeConstructor(ctx, classRef, urlSearchParamsConstructor)
assert(constructor != nil) # Ensure constructor is valid

Attempt to set private data

let result = JSObjectSetPrivate(constructor, castpointer)
assert(result) # Check if setting private data was successful

let globalObject = JSContextGetGlobalObject(ctx)
let nameStr = JSStringCreateWithUTF8CString(“myClass”)
JSObjectSetProperty(ctx, globalObject, nameStr, castJSValueRef, kJSPropertyAttributeNone, nil)
JSStringRelease(nameStr)
`