Function validate_commodity_graphs_for_model 

pub fn validate_commodity_graphs_for_model(
    commodity_graphs: &IndexMap<(RegionID, u32), CommoditiesGraph>,
    processes: &ProcessMap,
    commodities: &CommodityMap,
    time_slice_info: &TimeSliceInfo,
) -> Result<()>

Validates commodity graphs for the entire model.

The validation process checks three time slice levels:

• Annual: Validates annual-level commodities and processes
• Seasonal: Validates seasonal-level commodities and processes for each season
• Day/Night: Validates day/night-level commodities and processes for each time slice

Arguments

• commodity_graphs - Commodity graphs for each region and year, outputted from build_commodity_graphs_for_model
• processes - All processes in the model with their flows and activity limits
• commodities - All commodities with their types and demand specifications
• region_ids - Collection of regions to model
• years - Years to analyse
• time_slice_info - Time slice configuration (seasons, day/night periods)

Errors

Returns an error if:

• Commodity type rules are violated (e.g., SVD commodities being consumed)
• Demand cannot be satisfied