| Class | Superclass | Slots |
| pref-dim baseline cap-height | ||
| grid gap fill? row-heights column-widths |
| Word | Stack effect |
| ( grid-layout -- locs ) | |
| ( gadget -- cell ) | |
| ( grid -- grid-layout ) | |
| ( seq gap -- n ns ) | |
| ( grid-layout -- x xs ) | |
| ( grid-layout -- y ys ) | |
| ( row-locs row-cells -- row-locs' ) | |
| ( grid-layout -- dims ) | |
| ( grid-layout -- locs ) | |
| ( grid-layout -- widths ) | |
| ( children grid-layout -- ) | |
| ( grid-layout -- dim ) | |
| ( grid pair -- col# row ) | |
| ( cells quot -- seq ) | |
| ( grid-layout -- heights ) |
| Word | Stack effect |
| ( object -- ? ) | |
| ( object -- ? ) |