'A ClassReader supports Smalltalk source code reading and installation (compilation) from a stream, and writing to a stream. The source code is in ''chunk format''. A ClassReader is used for writing the entire source code of a class to a file, for reading a file to define a class, and for reading portions of a file to selectively recover methods (for example, from the change.log).
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.class : Contains the class to be worked on by the ClassReader.'