### Question:
InMemoryTracing { public static Builder builder() { return new AutoValue_InMemoryTracing.Builder(); }  abstract InMemorySpanExporter getSpanExporter(); static Builder builder();  }### Answer:
@Test void ctor_nullTracer() { assertThrows( NullPointerException.class, () -> InMemoryTracing.builder().setTracerSdkManagement(null).build(), "tracerProvider"); }