build

# File activesupport/lib/active_support/callbacks.rb, line 297
      def self.build(chain, filter, kind, options)
        if filter.is_a?(String)
          ActiveSupport::Deprecation.warn(            Passing string to define callback is deprecated and will be removed            in Rails 5.1 without replacement..squish)
        end

        new chain.name, filter, kind, options, chain.config
      end