(self, key)
Create an empty instance if it doesn't exist.
        If the instance already exists, this is a noop.
Create an empty instance if it doesn't exist.
        If the instance already exists, this is a noop.
Create an empty instance if it doesn t exist . If the instance already exists this is a noop .
def init_instance(self, key):
        """
        Create an empty instance if it doesn't exist.
        If the instance already exists, this is a noop.
        """
        with self._mor_lock:
            if key not in self._mor:
                self._mor[key] = {}
def init_instance ( self , key ) : with self . _mor_lock : if key not in self . _mor : self . _mor [ key ] = { }