code: public Set<?> getSelectedRows() {
  		Set<?> keys = getComponentModel().selectedRows;
  		if (keys == null) {
  			return Collections.emptySet();
  		} else {
  			return Collections.unmodifiableSet(keys);
  		}
  	}
docs: Retrieve the row keys that are selected.
  <p>
  A row key uniquely identifies each row and is determined by the {@link TableModel}. Refer to
  {@link TableModel#getRowKey(List)}.
  </p>
  
  @return the selected row keys.