We need to verify that the methods are only being invoked
on the global region.
Additionally, do not use CraftWorld#getChunk for retrieving
the Chunk object as it would trip a thread check. Rather,
we construct the CraftChunk manually as it is simply
a world+coordinates wrapper. The call never needed to block
until the chunk was loaded either.
Note that this requires the caller to be on a ticking region
or the global region, otherwise it will throw
UnsupportedOperationException.
Now the function returns the TPS for the current region.
