code: public boolean shouldInstrument(MutableClass mutableClass) {
      return !(mutableClass.isInterface()
              || mutableClass.isAnnotation()
              || mutableClass.hasAnnotation(DoNotInstrument.class))
          && (isInInstrumentedPackage(mutableClass.getName())
              || instrumentedClasses.contains(mutableClass.getName())
              || mutableClass.hasAnnotation(Instrument.class))
          && !(classesToNotInstrument.contains(mutableClass.getName()))
          && !(isInPackagesToNotInstrument(mutableClass.getName()));
    }
docs: Determine if {@link SandboxClassLoader} should instrument a given class.
  
  @param   mutableClass The class to check.
  @return  True if the class should be instrumented.