You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: deprecate.rb
    path of file: ./repos/truffleruby/lib/mri/rubygems
    
    the code of the file until where you have to start completion: # frozen_string_literal: true
##
# Provides 3 methods for declaring when something is going away.
#
# +deprecate(name, repl, year, month)+:
#     Indicate something may be removed on/after a certain date.
#
# +rubygems_deprecate(name, replacement=:none)+:
#     Indica
    
  def rubygems_deprecate_command(version = Gem::Deprecate.next_rubygems_major_version)
    class_eval do
      define_method "deprecated?" do
        true
      end

      define_method "deprecation_warning" do
        msg = [ "#{self.command} command is deprecated",
                ". It will be removed in Rubygems #{version}.\n",
        ]

        alert_warning "#{msg.join}" unless Gem::Deprecate.skip
      end
    end
  end