### Question:
BuiltInTypeUtils { public static boolean isBuiltInType(final String type) { return builtInTypeNames() .anyMatch(builtInTypeName -> Objects.equals(builtInTypeName, type)); }  static boolean isBuiltInType(final String type); static Optional<BuiltInType> findBuiltInTypeByName(final String name);  }### Answer:
@Test public void testIsDefaultWhenTypeIsDefault() { assertTrue(BuiltInTypeUtils.isBuiltInType("string")); }
@Test public void testIsDefaultWhenTypeIsDefaultWithAlternativeAlias() { assertTrue(BuiltInTypeUtils.isBuiltInType("dayTimeDuration")); }
@Test public void testIsNotDefaultWhenTypeIsDefaultWithAnUpperCaseCharacter() { assertFalse(BuiltInTypeUtils.isBuiltInType("String")); }
@Test public void testIsDefaultWhenTypeIsNull() { assertFalse(BuiltInTypeUtils.isBuiltInType(null)); }
@Test public void testIsDefaultWhenTypeIsNotDefault() { assertFalse(BuiltInTypeUtils.isBuiltInType("tAddress")); }