The spec should define what to do if gridbaglayout > MAXGRIDSIZE

The tck fails the RI IllegalArgument is thrown. If also fails
it if the constraints can't be retrieved exactly as set.

The spec defines MAXGRIDSIZE, but doesn't say what to do if an
attempt is made to exceed it.

protected static int
                 MAXGRIDSIZE
                           The maximum number of grid positions (both
                           horizontally and vertically) that can be
                           laid out by the grid bag layout.

This is also filed against the TCK as 4683183.