check_requirement!

# File lib/bundler/vendor/thor/lib/thor/parser/arguments.rb, line 166
    def check_requirement!
      return if @non_assigned_required.empty?
      names = @non_assigned_required.map do |o|
        o.respond_to?(:switch_name) ? o.switch_name : o.human_name
      end.join("', '")
      class_name = self.class.name.split("::").last.downcase
      raise RequiredArgumentMissingError, "No value provided for required #{class_name} '#{names}'"
    end