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<h4 class="subsection">10.2.8 Gray Streams examples</h4>
<p>Below are two classes of stream that can be conveniently defined as
wrappers for Common Lisp streams. These are meant to serve as
examples of minimal implementations of the protocols that must be
followed when defining Gray streams. Realistic uses of the Gray
Streams API would implement the various methods that can do I/O in
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