Synopsis

                    GogDataAllocator;
void                gog_data_allocator_allocate         (GogDataAllocator *dalloc,
                                                         GogPlot *plot);
gpointer            gog_data_allocator_editor           (GogDataAllocator *dalloc,
                                                         GogDataset *set,
                                                         int dim_i,
                                                         GogDataType data_type);