# File lib/facets/core/module/clone_using.rb, line 6
  def clone_renaming( pairs )
    mod = self.dup
    pairs.each_pair{ |to_sym, from_sym|
      mod.class_eval{
        alias_method( to_sym, from_sym )
        undef_method( from_sym )
      }
    }
    return mod
  end