code: public Document create(@NonNull String content, @NonNull Language language, @NonNull Map<AttributeType, ?> attributeMap) {
        return create("", content, language, attributeMap);
     }
docs: Creates a document with the given content written in the given language having the given set of attributes.
  
  @param content      the content
  @param language     the language
  @param attributeMap the attribute map
  @return the document