Sets whether to be homogeneous for the given fold and orientation.
If it is homogeneous, the [class@Leaflet] will request the same width or height for all its children depending on the orientation. If it isn't and it is folded, the leaflet may change width or height when a different child becomes visible.
| this |
a leaflet |
| folded |
the fold |
| orientation |
the orientation |
| homogeneous |
`TRUE` to make this homogeneous |