code: public String getSuppressedStackTrace(final String suffix) {
          final ThrowableProxy[] suppressed = this.getSuppressedProxies();
          if (suppressed == null || suppressed.length == 0) {
              return Strings.EMPTY;
          }
          final StringBuilder sb = new StringBuilder("Suppressed Stack Trace Elements:").append(EOL);
          for (final ThrowableProxy proxy : suppressed) {
              sb.append(proxy.getExtendedStackTraceAsString(suffix));
          }
          return sb.toString();
      }
docs: Format the suppressed Throwables.
  
  @return The formatted suppressed Throwables.
  @param suffix