### Question:
SelectionUtils { public static boolean isMultiColumn(final GridData uiModel) { return isMultiColumn(uiModel.getSelectedCells()); }  static boolean isMultiSelect(final GridData uiModel); static boolean isMultiRow(final GridData uiModel); static boolean isMultiColumn(final GridData uiModel); static boolean isMultiHeaderColumn(final GridData uiModel);  }### Answer:
@Test public void testIsMultiColumnZeroSelections() { assertThat(SelectionUtils.isMultiColumn(uiModel)).isFalse(); }
@Test public void testIsMultiColumnSingleSelection() { uiModel.selectCell(0, 0); assertThat(SelectionUtils.isMultiColumn(uiModel)).isFalse(); }
@Test public void testIsMultiColumnMultipleSelections() { uiModel.selectCell(0, 0); uiModel.selectCell(0, 1); assertThat(SelectionUtils.isMultiColumn(uiModel)).isTrue(); }