| ⇢ | C | Connection added |
| ⇢ | F | Connection::createDBConnection() added | |
| ⇢ | D | Connection::__construct() added | |
| ⇢ | C | Connection::connectionExists() added | |
| ⇢ | B | Connection::checkColumnName() added | |
| ⇢ | B | Connection::tableExists() added | |
| ⇢ | A | Connection::indexExists() added | |
| ⇢ | A | Connection::check_schema_version() added | |
| ⇢ | A | Connection::db() added | |
| ⇢ | A | Connection::getColumnName() added | |
| ⇢ | A | Connection::latest() added |