private void createNonSquashedChangesSeparator(@Nullable SimpleDiffChange previousChange, @NotNull Side side) {
    if (previousChange == null) return;

    int startLine = myChange.getStartLine(side);
    int endLine = myChange.getEndLine(side);

    int prevStartLine = previousChange.getStartLine(side);
    int prevEndLine = previousChange.getEndLine(side);

    if (startLine == endLine) return;
    if (prevStartLine == prevEndLine) return;
    if (prevEndLine != startLine) return;

    myHighlighters.addAll(DiffDrawUtil.createLineMarker(myViewer.getEditor(side), startLine, TextDiffType.MODIFIED));
  }
private void createNonSquashedChangesSeparator(@Nullable SimpleDiffChange previousChange, @NotNull Side side)