### Question:
FlowCache { public static FlowCacheBuilder builder() { return new FlowCacheBuilder(); } private  FlowCache(); private  FlowCache(FlowCacheBuilder builder); String getName(); FlowCacheDefinition getDefinition(); Direction getDirection(); String[] getKeyNames(); int getKeyNum(); String getPath(); String getJsonDefinition(); static FlowCacheBuilder builder(); @Override String toString();  }### Answer:
@Test public void testBuilder() { FlowCache.FlowCacheBuilder builder = null; try { builder = FlowCache.builder(); } catch (Exception e) { fail("Exception thrown: " + e.getMessage()); } assertNotNull(builder); }