@Test
void testWithExtension() {

    TableLineExtender extender = new TestTableLineExtender();
    TableLine tableLine = builder.withExtension(extender).build();
    TableLine expectedTableLine = new TableLine(ImmutableMap.of(
            "TestTableLine", "Test",
            "HasThisBeenAdded", "true"),
            ImmutableSet.of("TestTableLine"));
    checkTableLinesAreTheSame(expectedTableLine, tableLine);
}