code: public String getIndentCharacters() {
          if (nrOfIndentSpace == 0) {
              return "";
          }
          if (nrOfIndentSpace == INDENT_TAB) {
              return "\t";
          }
          if (nrOfIndentSpace < INDENT_TAB || nrOfIndentSpace > MAX_INDENT_SPACES) {
              throw new FailureException("nrOfIndentSpace cannot be below -1 or above 255, was: " + nrOfIndentSpace);
          }
          char[] chars = new char[nrOfIndentSpace];
          Arrays.fill(chars, ' ');
          return new String(chars);
      }
docs: Gets the indent characters from parameter.
  
  @return the indent characters