private boolean patternMatch(final LogEntry entry) {
      if (patterns == null || patterns.isEmpty()) {
        return true;
      }
      for (Pattern p : patterns) {
        if (p.matcher(entry.getContents()).matches()) {
          return true;
        }
      }
      return false;
    }
return true if the entry matches one or more regex patterns
geode-core/src/main/java/org/apache/geode/internal/logging/MergeLogFiles.java