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126
* through an additional tile_behaviour callback, which would return
127
127
* TB_IGNORE for tiles we don't want to visit and TB_DONT_LEAVE for tiles
128
128
* we won't be able to leave (at least alive).
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145
* There are few other options in the path-finding, including "omniscience"
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* (if true, all tiles are assumed to be KNOWN) and "get_zoc" callback (if