@Nullable public RangeHighlighter addMarker(ChangeSide changeSide, ChangeHighlighterHolder markup) { String text = changeSide.getText(); if (text != null && text.length() > 0) { return addBlock(text, changeSide, markup, myDiffType); } else { return addLine(markup, changeSide.getStartLine(), myDiffType, SeparatorPlacement.TOP); } }