### Question:
FlowCacheDefinition { public static FlowCacheDefinitionBuilder builder(){ return new FlowCacheDefinitionBuilder(); } private  FlowCacheDefinition(); private  FlowCacheDefinition(FlowCacheDefinitionBuilder builder); String getKeys(); String getValue(); String getFilter(); boolean getLog(); static FlowCacheDefinitionBuilder builder(); @Override String toString();  }### Answer:
@Test public void testBuilder() { FlowCacheDefinition.FlowCacheDefinitionBuilder builder = null; try { builder = FlowCacheDefinition.builder(); } catch (Exception e) { fail("Exception thrown: " + e.getMessage()); } assertNotNull(builder); }