public static extern JsErrorCode JsGetPropertyIdType(JsPropertyIdRef propertyId, out JsPropertyIdType propertyIdType);
public static extern JsErrorCode JsGetPropertyIdFromSymbol(JsValueRef symbol, out JsPropertyIdRef propertyId);
public static extern JsErrorCode JsHasOwnProperty(JsValueRef @object, JsPropertyIdRef propertyId, out bool hasOwnProperty);
public static extern JsErrorCode JsGetSymbolFromPropertyId(JsPropertyIdRef propertyId, out JsValueRef symbol);
public static extern JsErrorCode JsCreatePropertyId(string name, ulong length, out JsPropertyIdRef propertyId);
public static extern JsErrorCode JsCopyPropertyId(JsPropertyIdRef propertyId, char[] buffer, ulong bufferSize, out ulong length);
public static extern JsErrorCode JsDefineProperty(JsValueRef @object, JsPropertyIdRef propertyId, JsValueRef propertyDescriptor, out bool result);
public static extern JsErrorCode JsDeleteProperty(JsValueRef @object, JsPropertyIdRef propertyId, bool useStrictRules, out JsValueRef result);
public static extern JsErrorCode JsSetProperty(JsValueRef @object, JsPropertyIdRef propertyId, JsValueRef value, bool useStrictRules);
public static extern JsErrorCode JsGetOwnPropertyDescriptor(JsValueRef @object, JsPropertyIdRef propertyId, out JsValueRef propertyDescriptor);
public static extern JsErrorCode JsGetProperty(JsValueRef @object, JsPropertyIdRef propertyId, out JsValueRef value);