@Nullable
  private Pattern getCustomPattern() {
    String customFilter = getCustomFilter();
    if (myCustomPattern == null && customFilter != null) {
      final StringBuilder buf = new StringBuilder(customFilter.length());
      for (int i = 0; i < customFilter.length(); i++) {
        final char c = customFilter.charAt(i);
        if (Character.isLetterOrDigit(c)) {
          buf.append(Character.toUpperCase(c));
        }
        else {
          buf.append("\\").append(c);
        }
      }
      myCustomPattern = Pattern.compile(".*" + buf + ".*", Pattern.DOTALL);
    }
    return myCustomPattern;
  }
@Nullable
  private Pattern getCustomPattern()