code: private boolean isKnownException(@SlashedClassName String clsName) {
          for (String exceptionCls : knownExceptions) {
              if (clsName.startsWith(exceptionCls)) {
                  return true;
              }
          }
  
          return false;
      }
docs: determines if a suspected class is actually one of the known classes that have taken a bad package form by putting a tld later on in the package
  structure
  
  @param clsName
  the classname to check
  @return whether the classname is an exception