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_field_date_control.rb
    path of file: ./repos/manageiq/app/models
    
    the code of the file until where you have to start completion: class DialogFieldDateControl < DialogField
  AUTOMATE_VALUE_FIELDS = %w[show_past_dates read_only visible description].freeze

  include TimezoneMixin

  def show_past_dates
    options[:show_past_dates] || false
  end

  def show_past
    
  def normalize_automate_values(automate_hash)
    self.class::AUTOMATE_VALUE_FIELDS.each do |key|
      send(:"#{key}=", automate_hash[key]) if automate_hash.key?(key)
    end

    return default_time if automate_hash["value"].blank?

    begin
      DateTime.parse(automate_hash["value"].to_s).iso8601
    rescue
      default_time
    end