code: @Nullable
      public static String toArraySignature(String typeName) {
          String sig = classToSignature(typeName);
          if ((sig == null) || (sig.length() == 0)) {
              return sig;
          }
          return Values.SIG_ARRAY_PREFIX + sig;
      }
docs: Converts a type name into an array signature. Accepts slashed or dotted classnames, or type signatures.
  
  @param typeName
  the class name to generate an array signature from
  
  @return the array signature