public OkHttpClientBuilder setReadTimeoutMs(long l) {
    if (l < 0) {
      throw new IllegalArgumentException("Read timeout must be positive. Got " + l);
    }
    this.readTimeoutMs = l;
    return this;
  }
@Test
  public void build_throws_IAE_if_read_timeout_is_negative() {
    assertThatThrownBy(() -> underTest.setReadTimeoutMs(-10))
      .isInstanceOf(IllegalArgumentException.class)
      .hasMessage("Read timeout must be positive. Got -10");
  }