Link to eventpriority
Different priorities for Event listeners. NORMAL is the default level for a listener registered without a priority.
HIGHEST is the first to execute, LOWEST is the last to execute.
Link to импорт-класса
It might be required for you to import the package if you encounter any issues (like casting an Array), so better be safe than sorry and add the import at the very top of the file.
Link to enum-constants
EventPriority is an enum. It has 5 enum constants. They are accessible using the code below.
EventPriority.HIGHEST EventPriority.HIGH EventPriority.NORMAL EventPriority.LOW EventPriority.LOWEST