String () { StringBuilder buffer = new StringBuilder("content root:"); for (Map.Entry<ExternalSystemSourceType, Collection<SourceRoot>> entry : data.entrySet()) { buffer.append(StringUtil.toLowerCase(entry.getKey().toString())).append("=").append(entry.getValue()).append("|"); } if (!data.isEmpty()) { buffer.setLength(buffer.length() - 1); } return buffer.toString(); }