VirtualMachine
class VirtualMachine(val jscVirtualMachinePointer: <Error class: unknown class><<Error class: unknown class>>)
JSCVirtualMachine represents a group of JSCContexts. It allows concurrent JavaScript execution by creating a different instance of JSCVirtualMachine in each thread.
To create a group of JSCContexts pass the same JSCVirtualMachine instance to every JSCContext constructor.