def parents
      @parents ||= Array(nesting).map do |p|
        if p.is_a?(Class) && p < ActiveRecord::Base
          parent_entry(p)
        else
          p
        end
      end
    end
def parents
      @parents ||= Array(nesting).map do |p|
        if p.is_a?(Class) && p < ActiveRecord::Base
          parent_entry(p)
        else
          p
        end
      end
    end
Returns the parent entries of the current request, if any.
 These are ActiveRecords or namespace symbols, corresponding
 to the defined nesting attribute.