def _createchunks(self, command):
        """
    createChunks <box>

    Creates any chunks not present in the specified region.
    New chunks are filled with only air. New chunks are written
    to disk immediately.
    """
        if len(command) == 0:
            self.printUsage("createchunks")
            return

        box = self.readBox(command)

        chunksCreated = self.level.createChunksInBox(box)

        print "Created {0} chunks.".format(len(chunksCreated))

        self.needsSave = True

    createChunks <box>

    Creates any chunks not present in the specified region.
    New chunks are filled with only air. New chunks are written
    to disk immediately.
    
mce.py