API REFERENCE
ColumnGroupDef
Fields, allowed values, and APIs that use ColumnGroupDef.
Type definition
A question mark (?) marks an optional field; readonly marks a value you should not change directly. A union (|) accepts one of the listed forms. Functions are callbacks that Grid invokes at the relevant point.
export interface ColumnGroupDef<TLeaf extends GroupableLeaf = GroupableLeaf> {
headerName: string;
groupId?: string;
children: ReadonlyArray<TLeaf | ColumnGroupDef<TLeaf>>;
}