docs: public static UncheckedBinary fromBase64(String base64) {
          StringBuilder normalizedBase64 = new StringBuilder(base64.length()+3);
          for(int i = 0; i<base64.length(); i++) {
              char c = base64.charAt(i);
              if (c == '-') c = '+'; //translate from URL-safe
              if (c == '_') c = '/'; //translate from URL-safe
              if (c == '.') c = '='; //translate from custom URL-safe padding
              normalizedBase64.append(c);
          }
  
          //recreate padding
          while (normalizedBase64.length()%4 != 0) {
              normalizedBase64.append('=');
          }
  
          byte[] bytes = DatatypeConverter.parseBase64Binary(normalizedBase64.toString());
          return Binary.from(bytes);
      }