code: public void visitSource(String source, String debug) {
          if (cv != null) {
              cv.visitSource(source, debug);
          }
      }
docs: Visits the source of the class.
  
  @param source
  the name of the source file from which the class was compiled.
  May be <tt>null</tt>.
  @param debug
  additional debug information to compute the correspondance
  between source and compiled elements of the class. May be
  <tt>null</tt>.