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---

title: Row Grouping description: The API reference for the row grouping functionality in LyteNyte Grid.

AggFn<span className="type-tag" style={{ '--type-content': "'function'" }} />

<AutoTypeTable type={`export interface AggFn<T> { /** * Defines the function signature for custom

• aggregation logic that computes a result based on grid data. */ AggFn: <T>(data: (T | null)[], grid: Grid<T>) => unknown }`} />

AggModelFn<span className="type-tag" style={{ '--type-content': "'union'" }} />

<TypeTable type={{"AggModelFn":{"description":"Describes the aggregation model configuration.\n This can be either a string referencing a built-in\n aggregation or a custom function.","type":"string | AggFn"}}} />

RowGroupDisplayMode<span className="type-tag" style={{ '--type-content': "'union'" }} />

<TypeTable type={{"RowGroupDisplayMode":{"description":"Enumerates the display modes available for\n row groups in LyteNyte Grid.","type":""single-column" | "multi-column" | "custom""}}} />

RowGroupField<span className="type-tag" style={{ '--type-content': "'object'" }} />

Defines a field-based grouping configuration used to compute row group keys in the grid.

<AutoTypeTable path="../packages/commercial-lytenyte-pro/src/+types.ts" name="RowGroupField" />

RowGroupModelItem<span className="type-tag" style={{ '--type-content': "'union'" }} />

<TypeTable type={{"RowGroupModelItem":{"description":"An item in the row group model. This can either be a column identifier (string) or a row group field definition.","type":"string | RowGroupField"}}} />

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