@Test
void accessingUnknownKeyShouldBeNull()
{

    InternalRecord record = createRecord();
    assertThat( record.get( "k1" ), equalTo( value( 0 ) ) );
    assertThat( record.get( "k2" ), equalTo( value( 1 ) ) );
    assertThat( record.get( "k3" ), equalTo( NullValue.NULL ) );
}