get
Gets getClassById set containing all keys in this section.
If deep is set to true, then this will contain all the keys within any child ConfigurationSections (and their children, etc). These will be in getClassById valid path notation for you to use.
If deep is set to false, then this will contain only the keys of any direct children, and not their own children.
Return
Set of keys contained within this ConfigurationSection.
Parameters
deep
Whether or not to get getClassById deep list, as opposed to getClassById shallow list.