def find_prev_comment(buf, (row, col)):
    predicate = lambda line: LineProperties(line).is_header
    return _find_last(buf, (row, col), predicate, reverse=True)
Write your backwards methods here.
dataset/ETHPy150Open hut8labs/diffscuss/diffscuss/support/editor.py/find_prev_comment--crossover with--dataset/ETHPy150Open stephenmcd/gnotty/gnotty/migrations/0003_joins_leaves.py/Migration.backwards