register_class_with_precision

# File activerecord/lib/active_record/connection_adapters/abstract_adapter.rb, line 879
        def register_class_with_precision(mapping, key, klass, **kwargs) # :nodoc:
          mapping.register_type(key) do |*args|
            precision = extract_precision(args.last)
            klass.new(precision: precision, **kwargs)
          end
        end