code: def _validate(self, val: list, log: Optional[Logger] = None) -> Tuple[bool, List[str]]:
          
          errors = []
          if not isinstance(val, list):
              errors.append(f"{self._variable_name}: {repr(val)} is not an array")
          else:
              for i in range(0, len(val)):
                  v = val[i]
                  if not conforms(v, self._type, self._context.NAMESPACE):
                      errors.append(f"{self._variable_name} element {i}: {v} is not a {self._type.__name__}")
  
              if len(val) < self._min:
                  errors.append(
                      f"{self._variable_name}: at least {self._min} value{'s' if self._min > 1 else ''} required - "
                      f"element has {len(val) if len(val) else 'none'}")
              if self._max is not None and len(val) > self._max:
                  errors.append(
                      f"{self._variable_name}: no more than {self._max} values permitted - element has {len(val)}")
  
          if log:
              for error in errors:
                  log.log(error)
          return not bool(errors), errors
docs: Determine whether val is a valid instance of this array
  
          :returns: Success indicator and error list