private void registerRawDocumentType() {
        DocumentType x = new DocumentType("testraw");
        DataType d = DataType.RAW;
        x.addField(new Field("actualraw", d));
        types.registerDocumentType(x);
    }
Functional tests for com.yahoo.document.json.JsonWriter.

@author Steinar Knutsen
document/src/test/java/com/yahoo/document/json/JsonWriterTestCase.java