changes_applied

# File activemodel/lib/active_model/dirty.rb, line 146
    def changes_applied
      unless defined?(@attributes)
        @previously_changed = changes
      end
      @mutations_before_last_save = mutations_from_database
      @attributes_changed_by_setter = ActiveSupport::HashWithIndifferentAccess.new
      forget_attribute_assignments
      @mutations_from_database = nil
    end