fStructureInputPane.addOpenListener( new IOpenListener() { public void open(OpenEvent oe) {
fStructureInputPane.addOpenListener( oe -> feed1(oe.getSelection()) );
fStructureInputPane.addOpenListener( new IOpenListener() { public void open(OpenEvent oe) {
fStructureInputPane.addOpenListener( oe -> feed1(oe.getSelection()) );