def mark(self, mt):
        self.marktype = mt
        return self
True when the cursor is at the end of this line.
dataset/ETHPy150Open ellisonbg/altair/altair/api.py/Viz.mark--crossover with--dataset/ETHPy150Open jonathanslenders/python-prompt-toolkit/prompt_toolkit/document.py/Document.is_cursor_at_the_end_of_line