code: private String getWaveTypesString(final WaveType[] waveTypes) {
          final StringBuilder sb = new StringBuilder();
          for (final WaveType waveType : waveTypes) {
              sb.append(waveType.toString()).append(" ");
          }
          return sb.toString();
      }
docs: Return the human-readable list of Wave Type.
  
  @param waveTypes the list of wave type
  
  @return the string list of Wave Type