Function lines_by_name 

pub fn lines_by_name<'a>(
    mstore: &Store,
    settings: &SettingsType,
    agents: impl IntoIterator<Item = (&'a str, &'a str)>,
) -> Option<BTreeMap<&'a str, String>>

Each agent’s line by name, an agent with none left out, for the names route; None when swarm:sharesummaries is off. agents is (name, block_id). Reads the store.