Zone
What a closure should do when some zone it wants is already promised to another closure.
An overlap is narrower than it first sounds, and the distinction is the one this whole mechanism turns on. A zone another holder already holds is not an overlap: asking for it succeeds and waits for the hold to end, under every value here. An overlap is a zone that has been promised to a closure which has not yet been granted it -- a region still draining.
There is no right answer, which is why this is a parameter rather than a policy the guide path keeps. Two spills in the same aisle are usually one spill, cleaned once; two maintenance windows on the same leg are usually two, done in turn. Only the model knows which.
Properties
Functions
Returns the enum constant of this type with the specified name. The string must match exactly an identifier used to declare an enum constant in this type. (Extraneous whitespace characters are not permitted.)
Returns an array containing the constants of this enum type, in the order they're declared.