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TreeCellsCellFactoryParameters.expansionPairs property

A dictionary of level to expand under a given level. For example {'[Booking].[Desk].[Desk]': '[Booking].[Desk].[BookId]'} will expand '[Booking].[Desk].[BookId]' right under the level '[Booking].[Desk].[Desk]'. This can be used to pre-configure an expansion path, and mix levels from different hierarchies.

Signature:

expansionPairs?: {
        [a: string]: string;
    };