Required files
aquarium/utils/array_utils
aquarium/utils/hash_utils
aquarium/utils/set_utils
aquarium/utils/method_utils
aquarium/utils/name_utils
aquarium/utils/options_utils
aquarium/utils/default_logger
aquarium/utils/html_escaper
aquarium/utils/invalid_options
aquarium/utils/logic_error
aquarium/utils/nil_object