GridGroupingMode

Specifies the visualization mode for grouped data in the Grid.

The available options are:

• 'default' — Renders the legacy indent-cell grouping layout.
• 'compact' — Removes the empty indent cells and renders group headers across the full row width.
• 'singleColumn' — Renders a single dedicated group column for all group levels.
• 'multipleColumns' — Renders one dedicated group column per group level.