@property
    def cursor_position_row(self):
        row, _ = self._find_line_start_index(self.cursor_position)
        return row
Get a worker. This is called by o-routines and they expect a Callback
dataset/ETHPy150Open jonathanslenders/python-prompt-toolkit/prompt_toolkit/document.py/Document.cursor_position_row--crossover with--dataset/ETHPy150Open mgax/tinymail/src/tinymail/async.py/SimpleWorkerManager.get_worker