public long maxConcurrentStreams() {
		return maxConcurrentStreams;
	}
@Test
	void maxConcurrentStreamsBadValues() {
		assertThatExceptionOfType(IllegalArgumentException.class)
				.isThrownBy(() -> builder.maxConcurrentStreams(-2))
				.withMessage("maxConcurrentStreams must be greater than or equal to -1");
	}