• action_type : bless_buffer_event_info
• capacity : overlap_graph
• data : element
• dst_id : edge
• event_type : bless_buffer_event_info
• head : list , vertex
• in_degree : vertex
• key : element
• ln_offset : list
• mapping : vertex
• next : edge
• out_degree : vertex
• pos : element
• range_length : bless_buffer_event_info
• range_start : bless_buffer_event_info
• removed : edge
• save_fd : bless_buffer_event_info
• segment : vertex
• self_loop_weight : vertex
• size : overlap_graph
• src_id : edge
• tail : list , overlap_graph
• vertices : overlap_graph
• visited : vertex
• weight : edge