Add getAndMap(…) method to simplify post-retrieval mapping of non-null values. Require key on XInfoCommand command construction. Tweak javadoc. Reformat code. Original pull request: #519.
Add getAndMap(…) method to simplify post-retrieval mapping of non-null values. Require key on XInfoCommand command construction. Tweak javadoc. Reformat code. Original pull request: #519.