The entity is outdoor, not associated with any level.
Returns true if the value is Outdoor.
true
Returns true if the value is Range.
Returns true if the value is Single.
The single level value: the level for Single, the lower bound for Range, null for Outdoor.
null
Returns true if a level is contained in another level.
Returns the level difference between the current level and another level.
Returns the level of intersection between the current level and another level.
Returns true if a level intersects another one.
Returns the level(s) as a list: empty for Outdoor, one value for Single, two bounds for Range.
Returns the union of the current level and another level.