void vik_aggregate_layer_realize ( VikAggregateLayer *val, VikTreeview *vt, GtkTreeIter *layer_iter );
gboolean vik_aggregate_layer_load_layers ( VikAggregateLayer *val, FILE *f, gpointer vp );
gboolean vik_aggregate_layer_is_empty ( VikAggregateLayer *val );
const GList *vik_aggregate_layer_get_children ( VikAggregateLayer *val );
void vik_aggregate_layer_realize ( VikAggregateLayer *val, VikTreeview *vt, GtkTreeIter *layer_iter );
gboolean vik_aggregate_layer_load_layers ( VikAggregateLayer *val, FILE *f, gpointer vp );
gboolean vik_aggregate_layer_is_empty ( VikAggregateLayer *val );
const GList *vik_aggregate_layer_get_children ( VikAggregateLayer *val );