Provides an ASM class adapter that constructs a tree representation of the classes it visits. This class adapter can be useful to implement "complex" class manipulation operations, i.e., operations that would be very hard to implement without using a tree representation (such as optimizing the number of local variables used by a method).

However, this class adapter has a cost: it makes ASM bigger and slower. Indeed it requires more than twenty new classes, and multiplies the time needed to transform a class by almost two (it is almost two times faster to read, "modify" and write a class with a ClassAdapter than with a TreeClassAdapter). This is why this class adapter is bundled in an optional `asm-tree.jar` library that is separated from (but requires) the `asm.jar` library, which contains the core ASM framework. This is also why it is recommanded not to use this class adapter when it is possible. @since ASM 1.3.3