code: public ClassFile translate(ClassFile cf, Map<Object,Object> translations) {
          ClassFile cf2 = (ClassFile) translations.get(cf);
          if (cf2 == null) {
              ConstantPool constant_pool2 = translate(cf.constant_pool, translations);
              Field[] fields2 = translate(cf.fields, cf.constant_pool, translations);
              Method[] methods2 = translateMethods(cf.methods, cf.constant_pool, translations);
              Attributes attributes2 = translateAttributes(cf.attributes, cf.constant_pool,
                      translations);
  
              if (constant_pool2 == cf.constant_pool &&
                      fields2 == cf.fields &&
                      methods2 == cf.methods &&
                      attributes2 == cf.attributes)
                  cf2 = cf;
              else
                  cf2 = new ClassFile(
                          cf.magic,
                          cf.minor_version,
                          cf.major_version,
                          constant_pool2,
                          cf.access_flags,
                          cf.this_class,
                          cf.super_class,
                          cf.interfaces,
                          fields2,
                          methods2,
                          attributes2);
              translations.put(cf, cf2);
          }
          return cf2;
      }
docs: Create a new ClassFile from {@code cf}, such that for all entries
  {@code k&nbsp;-\&gt;&nbsp;v} in {@code translations},
  each occurrence of {@code k} in {@code cf} will be replaced by {@code v}.
  in
  @param cf the class file to be processed
  @param translations the set of translations to be applied
  @return a copy of {@code} with the values in {@code translations} substituted