• xor
• flip
• highestBitSet
• lowestBitSet

Based on something like .gitignore in the repo directory - method in FileUtils to return a collection of all files.

Allow properties to be get/set via annotations over an object
Also allow convenience methods to get boolean/long/int/float/double

When calling addCustomTypeAdapter() after GsonUtils.getGson() doesn't seem to have any effect as registerMoreTypeAdapters is only called when getGson() is called the very first time.
If this is expected behavior, then there should be some type of warning that addCustomTypeAdapter() will have no effect. Otherwise, it should force update the gsons.

as in 1,234,568 and 1 million 234 thousand and 568.