// 0
Document doc = new Document();
addGroupField(doc, groupField, "author1", canUseIDV);
doc.add(new TextField("content", "random text", Field.Store.YES));
doc.add(new Field("id", "1", customType));
w.addDocument(doc);
// 1
doc = new Document();
addGroupField(doc, groupField, "author1", canUseIDV);
doc.add(new TextField("content", "some more random text blob", Field.Store.YES));