internal static extern JavaScriptErrorCode JsSetRuntimeMemoryLimit(JavaScriptRuntime runtime, UIntPtr memoryLimit);
 internal static extern JavaScriptErrorCode JsDisposeRuntime(JavaScriptRuntime handle);
 internal static extern JavaScriptErrorCode JsGetRuntimeMemoryUsage(JavaScriptRuntime runtime, out UIntPtr memoryUsage);
 internal static extern JavaScriptErrorCode JsCollectGarbage(JavaScriptRuntime handle);
 internal static extern JavaScriptErrorCode JsCollectGarbage(JavaScriptRuntime handle);
 internal static extern JavaScriptErrorCode JsCreateContext(JavaScriptRuntime runtime, out JavaScriptContext newContext);
 internal static extern JavaScriptErrorCode JsEnableRuntimeExecution(JavaScriptRuntime runtime);
 internal static extern JavaScriptErrorCode JsCreateContext(JavaScriptRuntime runtime, out JavaScriptContext newContext);
 internal static extern JavaScriptErrorCode JsGetRuntime(JavaScriptContext context, out JavaScriptRuntime runtime);
 internal static extern JavaScriptErrorCode JsSetRuntimeMemoryAllocationCallback(JavaScriptRuntime runtime, IntPtr callbackState, JavaScriptMemoryAllocationCallback allocationCallback);
 internal static extern JavaScriptErrorCode JsSetRuntimeBeforeCollectCallback(JavaScriptRuntime runtime, IntPtr callbackState, JavaScriptBeforeCollectCallback beforeCollectCallback);
 internal static extern JavaScriptErrorCode JsSetRuntimeMemoryLimit(JavaScriptRuntime runtime, UIntPtr memoryLimit);
 internal static extern JavaScriptErrorCode JsGetRuntimeMemoryUsage(JavaScriptRuntime runtime, out UIntPtr memoryUsage);
 internal static extern JavaScriptErrorCode JsDisposeRuntime(JavaScriptRuntime handle);
 internal static extern JavaScriptErrorCode JsSetRuntimeMemoryAllocationCallback(JavaScriptRuntime runtime, IntPtr callbackState, JavaScriptMemoryAllocationCallback allocationCallback);
 internal static extern JavaScriptErrorCode JsEnableRuntimeExecution(JavaScriptRuntime runtime);
 internal static extern JavaScriptErrorCode JsSetRuntimeBeforeCollectCallback(JavaScriptRuntime runtime, IntPtr callbackState, JavaScriptBeforeCollectCallback beforeCollectCallback);
 internal static extern JavaScriptErrorCode JsIsRuntimeExecutionDisabled(JavaScriptRuntime runtime, out bool isDisabled);
 internal static extern JavaScriptErrorCode JsGetRuntime(JavaScriptContext context, out JavaScriptRuntime runtime);
 internal static extern JavaScriptErrorCode JsCreateRuntime(JavaScriptRuntimeAttributes attributes, JavaScriptThreadServiceCallback threadService, out JavaScriptRuntime runtime);
 internal static extern JavaScriptErrorCode JsIsRuntimeExecutionDisabled(JavaScriptRuntime runtime, out bool isDisabled);
 internal static extern JavaScriptErrorCode JsCreateRuntime(JavaScriptRuntimeAttributes attributes, JavaScriptThreadServiceCallback threadService, out JavaScriptRuntime runtime);