How to use the toast.toast function in toast

def _toast(self, text, length_long=False):
        if self.toasty:
            toast.toast(text, length_long)

def new_board(self, sgf_model=None, collection_model=None, from_file='', mode='Play', gridsize=19, handicap=0, goto=True):
        toast('Loading sgf', False)
        load_from_file = False

        t1 = time()

        # Get a collection and collectionsgf to contain and represent the board 
        filen = from_file
        if sgf_model is not None:
            sgf = sgf_model
            if sgf.filename:
                filen = sgf.filename
            load_from_file = True
        elif collection_model is not None:
            sgf = Sgf()
            sgf.save()
            collectionsgf = CollectionSgf(collection=collection_model, sgf=sgf)
            collectionsgf.save()