Function settle
pub fn settle(
moving: Placement,
others: &[Placement],
threshold: i32,
) -> PlacementExpand description
Where a dropped display settles: snapped to nearby lines, clear of every
other display, and touching at least one of them. Always a valid place
(is_valid): when the shortest way out of one display runs into
another, it rests at the nearest place flush against a side of one.