Tile priority function.
Function called on each tile change event.
FIXME empty description for jsdoc
Remove and return the highest-priority element. O(log N).
Element.
The element was added to the queue.
Count.
Number of tiles loading.
Protected
Event.
Is empty.
Key.
Is key queued.
Is queued.
Maximum number tiles to load simultaneously.
Maximum number of new tiles to load.
Tile priority function.