Package-level declarations

Place children such that each two adjacent ones are spaced by a fixed space distance across the main axis. The spacing will be subtracted from the available space that the children can occupy. The space can be negative, in which case children will overlap.

Place children horizontally such that each two adjacent ones are spaced by a fixed space distance. The spacing will be subtracted from the available width that the children can occupy. An alignment can be specified to align the spaced children horizontally inside the parent, in case there is empty width remaining. The space can be negative, in which case children will overlap.