Method checkObjectList

core/src/main/java/io/grpc/internal/JsonUtil.java:270–280

Casts a list of unchecked JSON values to a list of checked objects in Java type. If the given list contains a value that is not a Map, throws an exception.

(List<?> rawList)

   * If the given list contains a value that is not a Map, throws an exception.
   */
  @SuppressWarnings("unchecked")
  public static List<Map<String, ?>> checkObjectList(List<?> rawList) {
    for (int i = 0; i < rawList.size(); i++) {
      if (!(rawList.get(i) instanceof Map)) {
        throw new ClassCastException(
            String.format(
                Locale.US, "value %s for idx %d in %s is not object", rawList.get(i), i, rawList));
      }
    }
    return (List<Map<String, ?>>) rawList;
  }

  /**
   * Casts a list of unchecked JSON values to a list of String. If the given list