GridBuilder

// Without the builder
Modifier.
 gridTemplateColumns(
    GridEntry.TrackSize(40.px),
    GridEntry.TrackSize(1.fr),
    GridEntry.repeat(3, GridEntry.TrackSize(200.px))
 )
 gridTemplateRows(
   GridEntry.TrackSize(1.fr),
   GridEntry.TrackSize(1.fr),
 )
 gridAutoColumns(GridEntry.TrackSize(50.px))

// With the builder
Modifier.grid {
  columns { size(40.px); size(1.fr); repeat(3) { size(200.px) } }
  rows { size(1.fr); size(1.fr) }
  auto { columns { size(50.px) } }
}