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Many developers do not realize than they may have thousands or hundreds of thousands of Maps in memory, often
representing small JSON objects.
Often, memory may be consumed by lots of Maps or Sets (HashSet uses a HashMap to implement it's set).
Faster version of ByteArrayOutputStream that does not have synchronized methods and
also provides direct access to its internal buffer so that it does not need to be
duplicated when read.
These are all possible Delta.Commands that are generated when performing
the graph comparison.
This class implements a Thread-Safe (re-entrant) SimpleDateFormat
class.
This class wraps a class in order to cache the fields so they
are only reflectively obtained once.