Bukkit/CraftBukkit — comment on commit 7a931e977a13b53f8e5abaf31243e111d04fe2d0
File:  line 0
By RoyAwesome:

If you have a hashmap of blocks, and want to test the contents of your hashmap against a certain block (ie: Do I have a dirt block at (1,3,5) stored in my hashmap?). Currently, that fails.