code: private void updateIndentation(float indentLeft, float indentRight, float indentContent) {
          if(this.title != null) {
              this.title.setIndentLeft((int) (this.title.getIndentLeft() + indentLeft * RtfElement.TWIPS_FACTOR));
              this.title.setIndentRight((int) (this.title.getIndentRight() + indentRight * RtfElement.TWIPS_FACTOR));
          }
          for(int i = 0; i < this.items.size(); i++) {
              RtfBasicElement rtfElement = (RtfBasicElement) this.items.get(i);
              if(rtfElement instanceof RtfSection) {
                  ((RtfSection) rtfElement).updateIndentation(indentLeft + indentContent, indentRight, 0);
              } else if(rtfElement instanceof RtfParagraph) {
                  ((RtfParagraph) rtfElement).setIndentLeft((int) (((RtfParagraph) rtfElement).getIndentLeft() + (indentLeft + indentContent) * RtfElement.TWIPS_FACTOR));
                  ((RtfParagraph) rtfElement).setIndentRight((int) (((RtfParagraph) rtfElement).getIndentRight() + indentRight * RtfElement.TWIPS_FACTOR));
              }
          }
      }
docs: Updates the left, right and content indentation of all RtfParagraph and RtfSection
  elements that this RtfSection contains.
  
  @param indentLeft The left indentation to add.
  @param indentRight The right indentation to add.
  @param indentContent The content indentation to add.