final int bottom = top;
return abacus.getRef(getSheet(), null, left, top, right, bottom);
}
private Reference addRef() {
final Abacus abacus = getAbacus();
final int left = getColumn();
final int top = getRow();
final int right = left;
final int bottom = top;
return abacus.addRef(getSheet(), null, left, top, right, bottom);
}