### Question:
BasicRdfPatchSerializer implements RdfPatchSerializer { @Override public void delLanguageTaggedString(String subject, String predicate, String value, String language, String graph) throws LogStorageFailedException { value = escapeCharacters(value); if (graph == null) { graph = defaultGraph; } printer.accept( "-" + "<" + subject + "> <" + predicate + "> \"" + value + "\"@" + language + " <" + graph + "> .\n" ); } BasicRdfPatchSerializer(OutputStream output, String defaultGraph); protected  BasicRdfPatchSerializer(Consumer<String> printWriter, String defaultGraph); String getResults(); @Override void delRelation(String subject, String predicate, String object, String graph); @Override void delValue(String subject, String predicate, String value, String valueType, String graph); @Override void delLanguageTaggedString(String subject, String predicate, String value, String language, String graph); @Override MediaType getMediaType(); @Override Charset getCharset(); @Override void onPrefix(String prefix, String iri); @Override void onRelation(String subject, String predicate, String object, String graph); @Override void onValue(String subject, String predicate, String value, String valueType, String graph); @Override void onLanguageTaggedString(String subject, String predicate, String value, String language, String graph); @Override void close();  }### Answer:
@Test public void delLanguageTaggedValue() throws LogStorageFailedException { basicRdfPatchSerializer.delLanguageTaggedString("http: "http: assertThat(result, is("-<http: "\"That Seventies Show\"@en <http: }