tableViewer = new TableViewer(tableComposite, SWT.BORDER | SWT.FULL_SELECTION);

tableViewerColumn.setEditingSupport(new EditingSupport(tableViewer) {
			TextCellEditor textCellEditor = null;
			CheckboxCellEditor boolCellEditor = null;

			@Override
			protected boolean canEdit(Object element) {
				return true;
			}

			@Override
			protected CellEditor getCellEditor(Object element) {
				Object value = getValue(element);
				if (value instanceof String) {
					if (textCellEditor == null) {
						textCellEditor = new TextCellEditor((Composite) tableViewer.getControl());
					}
					return textCellEditor;
				}
				else if (value instanceof Boolean) {
					if (boolCellEditor == null) {
						boolCellEditor = new CheckboxCellEditor((Composite) tableViewer.getControl(),
								SWT.CHECK | SWT.READ_ONLY);
					}
					return boolCellEditor;
				}
				else {
					if (textCellEditor == null) {
						textCellEditor = new TextCellEditor((Composite) tableViewer.getControl());
					}
					return textCellEditor;
				}
			}

			@SuppressWarnings("unchecked")
			@Override
			protected void setValue(Object element, Object value) {
				if (value instanceof String) {
					((MyProperty<?>) element).setValueString(value != null ? value.toString() : null);
				}
				else if (value instanceof Boolean) {
					((MyProperty<Boolean>) element).setValue(value != null ? (Boolean) value : null);
				}
				tableViewer.refresh(element, true);

			}

			@Override
			protected Object getValue(Object element) {
				return ((MyProperty<?>) element).getValue();
			}
		});

get-view Navigation | get-tree | get-menu -path "Import..." | click
with [get-window Import] {
    get-tree | select "My Import"
    get-button "Next >" | click
}

get-window "My Import" | get-table | select "do.something" | double-click
with [get-window "My Import" | get-table] {
    select "do.something"
    get-cell 5 1 | check
}
get-window "My Import" | get-table | get-item -path "do.something" | get-property "columns[1]" 
    | equals true | verify-true
with [get-window "My Import"] {
    get-button "Next >" | click
    get-editbox -after [get-label "Project name; must be unique"] | set-text "simple-project"
    get-button Finish | click
}

get-window "My Import" | get-table | select "do.something" | double-click
with [get-window "My Import" | get-table] {
    select "do.something"
       get-cell 5 1 | activate-cell-edit | check
}