private JsValue ToPrimitive(JsValue thisObject, JsValue[] arguments)
{
if (thisObject.IsSymbol())
{
return(thisObject);
}
// Steps 3. and 4.
var o = thisObject.AsInstance <SymbolInstance>();
if (ReferenceEquals(o, null))
{
ExceptionHelper.ThrowTypeError(Engine);
}
return(o.SymbolData);
}