code: protected int setFromIPage(PdfImportedPage iPage) {
          int pageNum = iPage.getPageNumber();
          PdfReaderInstance inst = currentPdfReaderInstance = iPage.getPdfReaderInstance();
          reader = inst.getReader();
          setFromReader(reader);
          return pageNum;
      }
docs: convenience method. Given an imported page, set our "globals"