class ComplexConfig::Tree

def to_enum
  Enumerator.new do |y|
    y.yield @name
    @children.each_with_index do |child, child_index|
      children_enum = child.to_enum
      if child_index < @children.size - 1
        children_enum.each_with_index do |setting, i|
          y.yield "#{inner_child_prefix(i)}#{setting}"
        end
      else
        children_enum.each_with_index do |setting, i|
          y.yield "#{last_child_prefix(i)}#{setting}"
        end
      end
    end
  end
end