### Question:
SpannerColumnMetadata implements ColumnMetadata { @Override public String getName() { return this.columnField.getName(); } SpannerColumnMetadata(Field columnField); @Override String getName(); @Override Type getNativeTypeMetadata();  }### Answer:
@Test public void testEmptyFieldName() { SpannerColumnMetadata metadata = new SpannerColumnMetadata(Field.getDefaultInstance()); assertThat(metadata.getName()).isEmpty(); }