You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: dialog_tab.rb
    path of file: ./repos/manageiq/app/models
    
    the code of the file until where you have to start completion: class DialogTab < ApplicationRecord
  include DialogMixin
  has_many   :dialog_groups, -> { order(:position) }, :dependent => :destroy
  belongs_to :dialog
  validate :validate_children

  alias_attribute :order, :position

  def each_dialog_field(&block)
    dialog_fields.each(&block)
  end

  def dialog_fields
    dialog_groups.flat_map(&:dialog_fields)
  end

  def dialog_resources
   
    
  def validate_children
    # To remove the meaningless error message like "Dialog groups is invalid" when child's validation fails
    errors.delete(:dialog_groups)
    errors.add(:base, _("Tab %{tab_label} must have at least one Box") % {:tab_label => label}) if dialog_groups.blank?

    dialog_groups.each do |dg|
      next if dg.valid?

      dg.errors.full_messages.each do |err_msg|
        errors.add(:base, _("Tab %{tab_label} / %{error_message}") % {:tab_label => label, :error_message => err_msg})
      end
    end
  end