code: protected void addRangeBounds(BandData band, CellReference[] crefs) {
          if (templateBounds.containsKey(band.getName()))
              return;
          Bounds bounds = new Bounds(crefs[0].getRow(), crefs[0].getCol(), crefs[crefs.length - 1].getRow(), crefs[crefs.length - 1].getCol());
          templateBounds.put(band.getName(), bounds);
      }
docs: This method adds range bounds to cache. Key is bandName
  
  @param band  - band
  @param crefs - range