/**
 * Adds a filter text box in the view toolbar
 */
private ControlContribution createObjectsFilterText() {
	//create filter text composite
	ControlContribution filterTextboxContribution = new ControlContribution("AbapGitStagingView.filterText") { //$NON-NLS-1$
		protected Control createControl(Composite parent) {
			Composite filterComposite = AbapGitStagingView.this.toolkit.createComposite(parent, 0);
			GridLayoutFactory.fillDefaults().numColumns(2).applyTo(filterComposite);
			filterComposite.setBackground(null);

			AbapGitStagingView.this.filterText = new Text(filterComposite, SWT.SEARCH | SWT.ICON_CANCEL | SWT.ICON_SEARCH);
			AbapGitStagingView.this.filterText.setMessage(Messages.AbapGitStaging_object_filter_text);
			GridData data = new GridData(SWT.LEFT, SWT.TOP, true, false);
			data.minimumWidth = 150;
			AbapGitStagingView.this.filterText.setLayoutData(data);

			AbapGitStagingView.this.filterText.addModifyListener(e -> applyFilter());
			return filterComposite;
		}
	};
	return filterTextboxContribution;
}
 

private void addResourcesArea(Composite composite) {  
	ResourceSelectionTree.IToolbarControlCreator toolbarControlCreator = new ResourceSelectionTree.IToolbarControlCreator() {
  public void createToolbarControls(ToolBarManager toolbarManager) {
    toolbarManager.add(new ControlContribution("stealLock") {
      protected Control createControl(Composite parent) {
        stealButton = new Button(parent, SWT.CHECK);
        stealButton.setText(Policy.bind("LockDialog.stealLock")); //$NON-NLS-1$		
        return stealButton;
      }
    });
  }
  public int getControlCount() {
    return 1;
  }
};
	resourceSelectionTree = new ResourceSelectionTree(composite, SWT.NONE, "These files will be locked:", files, new HashMap(), null, false, toolbarControlCreator, null); //$NON-NLS-1$    	
	resourceSelectionTree.setShowRemoveFromViewAction(false);
}