• _average_area : fastjet::ClusterSequenceActiveArea
• _history : fastjet::ClusterSequence
• _jets : fastjet::ClusterSequence
• child : fastjet::ClusterSequence::history_element
• dij : fastjet::ClusterSequence::history_element
• jetp_index : fastjet::ClusterSequence::history_element
• max_dij_so_far : fastjet::ClusterSequence::history_element
• parent2 : fastjet::ClusterSequence::history_element