### Question:
PropertiesFileConverter implements ValueConverter<Map<String, String>> { @Override public Class<Map<String, String>> valueType() { return null; }  @Override Map<String, String> convert( String value ); @Override Class<Map<String, String>> valueType(); @Override String valuePattern();  }### Answer:
@Test public void testValueType() { PropertiesFileConverter pfc = new PropertiesFileConverter(); assertNull( pfc.valueType() ); }