# File lib/fssm/tree.rb, line 34
    def each(prefix=nil, &block)
      @children.each do |segment, node|
        cprefix = prefix ?
                FSSM::Pathname.for(prefix).join(segment) :
                FSSM::Pathname.for(segment)
        block.call([cprefix, node])
        node.each(cprefix, &block)
      end
    end