left_border_style(ht)right_border_style(ht)
top_border_style(ht)
bottom_border_style(ht)
left_border_style(ht) <- value
right_border_style(ht) <- value
top_border_style(ht) <- value
bottom_border_style(ht) <- value
set_left_border_style(ht, row, col, value)
set_right_border_style(ht, row, col, value)
set_top_border_style(ht, row, col, value)
set_bottom_border_style(ht, row, col, value)
map_left_border_style(ht, row, col, fn)
map_right_border_style(ht, row, col, fn)
map_top_border_style(ht, row, col, fn)
map_bottom_border_style(ht, row, col, fn)