HttpHeadersB3Formatter extends AbstractTextB3Formatter { @Override public Format<TextMap> getFormatType() { return ExtendFormat.Builtin.B3_HTTP_HEADERS; }  @Override Format<TextMap> getFormatType();  }
@Test public void testGetFormatType() throws Exception { assertSame(ExtendFormat.Builtin.B3_HTTP_HEADERS, registryExtractorInjector.getFormatType()); }