code: @OverrideOnDemand
    @Nonnull
    protected String getValueAsString (@Nullable final Object aValue)
    {
      final String sValue = TypeConverter.convert (aValue, String.class);
      return sValue != null ? sValue : "";
    }
docs: Convert the source value to a string by using the {@link TypeConverter}.
  
  @param aValue
  The value to be converted to a string
  @return The string representation of the object and never <code>null</code>
  .