I want to use multi-checkbox filtering with complex datasource. However, the name of the field on which the filtering needs to be applied is not the same as the column field. Thus, in order to avoid custom implementation I would like to have an option to set which is the field that should be used for the filtering.

For example, in the Dojo linked here, I would like to filter the country column, but the filter field in the filterable datasource is 'id'.