question: @ Override public void valueChanged ( TreeSelectionEvent e ) { if ( preventEvent ) { return ; } if ( mainFrame != null ) { List < Operator > selectedOperators = getSelectedOperators ( ) ; if ( selectedOperators != null && ! selectedOperators . isEmpty ( ) ) { mainFrame . selectOperators ( selectedOperators ) ; } } }
target:  This method will be invoked after a user selection of an operator in the tree. Causes a property table update and an update of the conditional action container.