Gem.load_yaml

# File tmp/rubies/ruby-4.1.0-preview1/lib/rubygems.rb, line 656
def self.load_yaml
  return if @yaml_loaded

  @use_psych = ENV["RUBYGEMS_USE_PSYCH"] == "true" ||
               (defined?(@configuration) && @configuration && !@configuration[:use_psych].nil?)

  if @use_psych
    require "psych"
    require_relative "rubygems/psych_tree"
  end

  require_relative "rubygems/yaml_serializer"
  require_relative "rubygems/safe_yaml"

  @yaml_loaded = true
end