Function collect_step 

pub fn collect_step<A, M, AgentRow, ModelRow>(
    model: &M,
    agent_ids: &[AgentId],
    agent_report: Option<&dyn Fn(&A, &M) -> AgentRow>,
    model_report: Option<&dyn Fn(&M) -> ModelRow>,
    agent_data: &mut Vec<AgentRow>,
    model_data: &mut Vec<ModelRow>,
)
where
    A: Agent,
    M: Model<Agent = A>,

Collect one step’s worth of agent and model data.

For each agent ID in agent_ids, if the agent exists and agent_report is Some, the reporter closure is called and the result appended to agent_data. If model_report is Some, one model-level row is appended to model_data.

Arguments

• model - the model to collect from.
• agent_ids - the agent IDs to report on (typically from Model::agent iteration).
• agent_report - optional closure (&Agent, &Model) -> AgentRow.
• model_report - optional closure (&Model) -> ModelRow.
• agent_data - accumulator for agent-level rows.
• model_data - accumulator for model-level rows.