docs: def wait_condition_spec(self):
          """Spec for a wait_condition block"""
          from harpoon.option_spec import image_objs
          formatted_string = formatted(string_spec(), formatter=MergedOptionStringFormatter)
          return create_spec(image_objs.WaitCondition
              , harpoon = formatted(overridden("{harpoon}"), formatter=MergedOptionStringFormatter)
              , timeout = defaulted(integer_spec(), 300)
              , wait_between_attempts = defaulted(float_spec(), 5)
  
              , greps = optional_spec(dictof(formatted_string, formatted_string))
              , command = optional_spec(listof(formatted_string))
              , port_open = optional_spec(listof(integer_spec()))
              , file_value = optional_spec(dictof(formatted_string, formatted_string))
              , curl_result = optional_spec(dictof(formatted_string, formatted_string))
              , file_exists = optional_spec(listof(formatted_string))
              )