Macro agent_states_iter 

macro_rules! agent_states_iter {
    ($configuration:expr, $name:ident, $($iter:tt)*) => { ... };
}

A macro for iterating on all the agents of some type in a configuration.

Usage is agent_states_iter!(configuration, TYPE_NAME, iterations) to iterate on the states of the instances of the configuration’s agents of the global TYPE_NAME variable declared by declare_agent_type_data. Iteration is some iterator method, as if we wrote states.iter().iteration (e.g., iteration could be for_each(|state| ...).