### Question:
StructuredEmbeddingsBuilder { public boolean isEmpty() { return embeddings.isEmpty(); }  void add(StructuredEmbedding embedding); void addStartDateTime(); boolean isEmpty(); String build(); static final String HUMAN_AND_MACHINE_READABLE_TIMESTAMP_PATTERN; }### Answer:
@Test public void build_ShouldReturnTrue_WhenNoStructuredEmbeddingsHaveBeenAdded() { StructuredEmbeddingsBuilder builder = new StructuredEmbeddingsBuilder(); final boolean empty = builder.isEmpty(); assertThat(empty).isTrue(); }