def _degrief(self, command):
        """
    degrief [ <height> ]

    Reverse a few forms of griefing by removing
    Adminium, Obsidian, Fire, and Lava wherever
    they occur above the specified height.
    Without a height, uses height level 32.

    Removes natural surface lava.

    Also see removeEntities
    """
        box = self.level.bounds
        box = BoundingBox(box.origin + (0, 32, 0), box.size - (0, 32, 0))
        if len(command):
            try:
                box.miny = int(command[0])
            except ValueError:
                pass

        print "Removing grief matter and surface lava above height {0}...".format(box.miny)

        self.level.fillBlocks(box,
                              self.level.materials.Air,
                              blocksToReplace=[self.level.materials.Bedrock,
                                               self.level.materials.Obsidian,
                                               self.level.materials.Fire,
                                               self.level.materials.LavaActive,
                                               self.level.materials.Lava,
                              ]
        )
        self.needsSave = True

    degrief [ <height> ]

    Reverse a few forms of griefing by removing
    Adminium, Obsidian, Fire, and Lava wherever
    they occur above the specified height.
    Without a height, uses height level 32.

    Removes natural surface lava.

    Also see removeEntities
    
mce.py