LockFile
@Js
const class LockFile : Obj
LockFile is used to acquire an exclusive lock to prevent two different processes from using same files
Construct with given file
Backing file we use to lock/acquire
Release the lock if we are holding one
Acquire the lock or raise CannotAcquireLockFileErr
File file()
Backing file we use to lock/acquire
This lock()
Acquire the lock or raise CannotAcquireLockFileErr
new make(File file)
Construct with given file
This unlock()
Release the lock if we are holding one