### Question:
PrefixedConfig implements Serializable { public int getCompletionConfig() { return completionConfig; }  String getPrefix(); void setPrefix(String prefix); int getCompletionConfig(); void setCompletionConfig(int completionConfig);  }### Answer:
@Test public void testGetCompletionConfig() throws Exception { classUnderTest.setCompletionConfig(10); assertEquals(10, classUnderTest.getCompletionConfig()); }