FISH for feblocks.
fblock
feblock.adjacent
feblock.block
feblock.gplist
feblock.index
feblock.material
feblock.next
feblock.pos
feblock.type
feblock.face
feblock.face.hostblock
feblock.face.index
feblock.face.next
feblock.face.normal
feblock.face.number
feblock.face.pos
feblock list