### Question:
NamedFieldsMapping implements FieldsMapping { @Override public int size() { return actualToMetaFieldMapping.length; } NamedFieldsMapping( int[] actualToMetaFieldMapping ); @Override int fieldMetaIndex( int index ); @Override int size(); static NamedFieldsMapping mapping( String[] actualFieldNames, String[] metaFieldNames );  }### Answer:
@Test public void size() { assertEquals( 2, fieldsMapping.size() ); }