docs: private static int checkClassTypeSignature(final String signature, int pos) {
          // ClassTypeSignature:
          // L Identifier ( / Identifier )* TypeArguments? ( . Identifier
          // TypeArguments? )* ;
  
          pos = checkChar('L', signature, pos);
          pos = checkIdentifier(signature, pos);
          while (getChar(signature, pos) == '/') {
              pos = checkIdentifier(signature, pos + 1);
          }
          if (getChar(signature, pos) == '<') {
              pos = checkTypeArguments(signature, pos);
          }
          while (getChar(signature, pos) == '.') {
              pos = checkIdentifier(signature, pos + 1);
              if (getChar(signature, pos) == '<') {
                  pos = checkTypeArguments(signature, pos);
              }
          }
          return checkChar(';', signature, pos);
      }