code: private ImageView createBlankSpace() {
          ImageView view = new ImageView(getContext());
          TableRow.LayoutParams params = new TableRow.LayoutParams(mSwatchLength, mSwatchLength);
          params.setMargins(mMarginSize, mMarginSize, mMarginSize, mMarginSize);
          view.setLayoutParams(params);
          return view;
      }
docs: Creates a blank space to fill the row.