<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def _getStore(self):
 """ Get the Store used for FTS. If it does not exist, it is created and initialised. """

        storeDir = self.store.newDirectory(self.indexDirectory)
        if not storeDir.exists():
            store = Store(storeDir)
            self._initStore(store)
            return store
        else:
            return Store(storeDir)