module AASM::Persistence::ActiveRecordPersistence::InstanceMethods

def aasm_column_is_blank?(state_machine_name)
  attribute_name = self.class.aasm(state_machine_name).attribute_name
  attribute_names.include?(attribute_name.to_s) &&
    (send(attribute_name).respond_to?(:empty?) ? !!send(attribute_name).empty? : !send(attribute_name))
end