def delete_tracked(name)
      groups.values.each {|v| v.delete_tracked name }
      name
    end
def delete_tracked(name)
      groups.values.each {|v| v.delete_tracked name }
      name
    end
call-seq:
   delete_tracked(name) => name

 Removes method +name+ from all #groups.

 Returns passed +name+.