Extra space to redistribute among children after subtracting minimum sizes and any child padding from the overall allocation
An array of structs with a client pointer and a minimum/natural size in the orientation of the allocation.
The remainder of extra_space after redistributing space to sizes.
Distributes extra_space to child sizes by bringing smaller children up to natural size first.
The remaining space will be added to the minimum_size member of the gtk.types.RequestedSize struct. If all sizes reach their natural size then the remaining space is returned.