code: def get_coverage(config: CoverageConfig) -> 'Coverage':
      
      if config.type == C.COVERAGE_COUNT or config.type == C.COVERAGE_FERTILITY:
          utils.check_condition(config.num_hidden == 1, "Count or fertility coverage requires coverage_num_hidden==1")
      if config.type == C.GRU_TYPE:
          return GRUCoverage(config.num_hidden, config.layer_normalization)
      elif config.type in {C.TANH, C.SIGMOID, C.RELU, C.SOFT_RELU}:
          return ActivationCoverage(config.num_hidden, config.type, config.layer_normalization)
      elif config.type == C.COVERAGE_COUNT:
          return CountCoverage()
      elif config.type == C.COVERAGE_FERTILITY:
          return FertilityCoverage(config.max_fertility)
      else:
          raise ValueError("Unknown coverage type %s" % config.type)
docs: Returns a Coverage instance.
  
      :param config: Coverage configuration.
      :return: Instance of Coverage.