# Package org.spongepowered.asm.transformers

Specialised ASM utility and base classes used by the mixin processor.

- Class Summary
  Class | Description
  --- | ---
  MixinClassReader | A ClassReader which returns a more verbose exception message when the incoming class major version is higher than the version supported by the active ASM.
  MixinClassWriter | ClassWriter which resolves common superclasses using Mixin's metadata instead of calling Class.forName
  TreeTransformer | Base class for transformers which work with ASM tree model