RaftFleet.whereis_leader
You're seeing just the function
whereis_leader, go back to RaftFleet module for more information.
Specs
Tries to find the current leader of the consensus group specified by name.
Usually you don't have to use this function as command/5 and query/5 automatically resolves where the leader resides.
This function is useful when you want to inspect status of a consensus group by using e.g. RaftedValue.status/1.