myViewer.setSelection(new StructuredSelection(myBlankValue), true);
if (myBlankValue == null) {  } else { myViewer.setSelection(new StructuredSelection(myBlankValue), true); }
  protected void setSelectedValue(Object _newValue) {    if (_newValue == null || _newValue == myBlankValue || (myBlankValue != null && myBlankValue.equals(_newValue))) {      myViewer.setSelection(new StructuredSelection(myBlankValue), true);    }    else {      myViewer.setSelection(new StructuredSelection(_newValue), true);    }  }