X3m.System.Scheduler.in_memory_interval

You're seeing just the callback in_memory_interval, go back to X3m.System.Scheduler module for more information.
Link to this callback

in_memory_interval()

View Source (optional)

Specs

in_memory_interval() :: milliseconds :: pos_integer()

This is optional callback that should return in which interval (in milliseconds) alarms should be loaded.