code: public void setInHeader(boolean inHeader) {
          this.inHeader = inHeader;
          for(int i = 0; i < this.content.size(); i++) {
              ((RtfBasicElement) this.content.get(i)).setInHeader(inHeader);
          }
      }
docs: Sets whether this RtfCell is in a header
  
  @param inHeader <code>True</code> if this RtfCell is in a header, <code>false</code> otherwise