clear_changes_information

# File activemodel/lib/active_model/dirty.rb, line 197
    def clear_changes_information
      @previously_changed = ActiveSupport::HashWithIndifferentAccess.new
      @mutations_before_last_save = nil
      @attributes_changed_by_setter = ActiveSupport::HashWithIndifferentAccess.new
      forget_attribute_assignments
      @mutations_from_database = nil
    end