@Override
  public String getShortNameForLine(String name) {
    Matcher matcher = MEMBER_ID_RE.matcher(name);
    if (matcher.matches()) {
      return matcher.group(1);
    } else {
      return name;
    }
  }
A lifeline mapper that just returns a shortened version of a member id.
geode-core/src/test/java/org/apache/geode/sequence/DefaultLineMapper.java