### Question:
ParserConfiguration { public boolean isParsingOfNamedNullsAllowed() { return this.allowNamedNulls; } ParserConfiguration();  ParserConfiguration(ParserConfiguration other); ParserConfiguration registerDataSource(final String name, final DataSourceDeclarationHandler handler); DataSource parseDataSourceSpecificPartOfDataSourceDeclaration(PositiveLiteral declaration); Constant parseDatatypeConstant(final String lexicalForm, final String datatype,
			final TermFactory termFactory); boolean isConfigurableLiteralRegistered(ConfigurableLiteralDelimiter delimiter); Term parseConfigurableLiteral(ConfigurableLiteralDelimiter delimiter, String syntacticForm,
			final SubParserFactory subParserFactory); ParserConfiguration registerDatatype(final String name, final DatatypeConstantHandler handler); ParserConfiguration registerLiteral(ConfigurableLiteralDelimiter delimiter,
			ConfigurableLiteralHandler handler); ParserConfiguration registerDirective(String name, DirectiveHandler<KnowledgeBase> handler); KnowledgeBase parseDirectiveStatement(String name, List<Argument> arguments,
			SubParserFactory subParserFactory); ParserConfiguration setNamedNulls(boolean allow); ParserConfiguration allowNamedNulls(); ParserConfiguration disallowNamedNulls(); boolean isParsingOfNamedNullsAllowed(); String getImportBasePath(); ParserConfiguration setImportBasePath(String importBasePath); static final List<String> RESERVED_DIRECTIVE_NAMES; }### Answer:
@Test public void isParsingOfNamedNullsAllowed_default_returnsTrue() { assertTrue("named nulls are allowed by default", parserConfiguration.isParsingOfNamedNullsAllowed()); }