The row type.
The context type.
Convenience copy of column.colId.
The column this geometry belongs to.
Offset from the left edge of the full (unscrolled) column strip.
OptionalpinnedWhich edge this column is pinned to, if any.
left/right offset to use for position: sticky on pinned columns.
Final pixel width, after flex distribution and user resizing.
Geometry for one visible column, computed once per layout change.