# |------------------------------------>|
# |events-database                      |
# |                                     |
# |------------------------------------>|
# |events-index                         |------------------->|--------------------->|------------------------------->|--------------------->|
# |                                     |model-zenmigrate    3  model-zenpack       4  perf-convert                  5  perf-import         6
# |------------------------------------>|
# |model-database                       |
# |                                     |
# |------------------------------------>|
# |model-catalog                        2
# 1