build

# File activesupport/lib/active_support/callbacks.rb, line 216
          def self.build(callback_sequence, user_callback, user_conditions, chain_config)
            if chain_config[:skip_after_callbacks_if_terminated]
              if user_conditions.any?
                halting_and_conditional(callback_sequence, user_callback, user_conditions)
              else
                halting(callback_sequence, user_callback)
              end
            else
              if user_conditions.any?
                conditional callback_sequence, user_callback, user_conditions
              else
                simple callback_sequence, user_callback
              end
            end
          end