Will this attribute change the next time we save?
This method is useful in validations and before callbacks to determine if the next call to
savewill change a particular attribute. It can be invoked aswill_save_change_to_name?instead ofwill_save_change_to_attribute?("name").Options
fromWhen passed, this method will return false unless the original value is equal to the given option
toWhen passed, this method will return false unless the value will be changed to the given value