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 GtkRequestedSize struct. If all sizes reach their natural size then the remaining space is returned.
Extra space to redistribute among children after subtracting minimum sizes and any child padding from the overall allocation
Number of requests to fit into the 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.