from spb import *
graphics(
    arrow_2d((0, 0), (1, 1)),
    arrow_2d((0, 0), (-1, 1)),
    grid=False, aspect="equal"
)
# Expected:
## Plot object containing:
## [0]: 2D arrow from (0.0, 0.0) to (1.0, 1.0)
## [1]: 2D arrow from (0.0, 0.0) to (-1.0, 1.0)