activesupport/lib/active_support/core_ext/module/method_names.rb


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class Module
  if instance_methods[0].is_a?(Symbol)
    def instance_method_names(*args)
      instance_methods(*args).map(&:to_s)
    end

    def method_names(*args)
      methods(*args).map(&:to_s)
    end
  else
    alias_method :instance_method_names, :instance_methods
    alias_method :method_names, :methods
  end
end