Method nextNull

gson/src/main/java/com/google/gson/stream/JsonReader.java:1006–1017

Consumes the next token from the JSON stream and asserts that it is a literal null. @throws IllegalStateException if the next token is not a JSON null.

()

   * @throws IllegalStateException if the next token is not a JSON null.
   */
  public void nextNull() throws IOException {
    int p = peeked;
    if (p == PEEKED_NONE) {
      p = doPeek();
    }
    if (p == PEEKED_NULL) {
      peeked = PEEKED_NONE;
      pathIndices[stackSize - 1]++;
    } else {
      throw unexpectedTokenError("null");
    }
  }

  /**
   * Returns the {@link JsonToken#NUMBER double} value of the next token, consuming it. If the next