code: @Nonnull
    public static String getWithoutAnySpaces (@Nullable final String sStr)
    {
      if (sStr == null)
        return "";
  
      // Trim first
      final char [] aChars = sStr.trim ().toCharArray ();
      final StringBuilder aResult = new StringBuilder (aChars.length);
      for (final char c : aChars)
        if (!Character.isWhitespace (c) && !Character.isSpaceChar (c))
          aResult.append (c);
      return aResult.toString ();
    }
docs: Get the passed string where all spaces (white spaces or unicode spaces) have
  been removed.
  
  @param sStr
  The source string. May be <code>null</code>
  @return A non-<code>null</code> string representing the passed string without
  any spaces