handler: () => { fbWidget.download(); }
handler: () => { fbWidget.shutdownKernels(); }
handler: () => { fbWidget.copy(); }
handler: () => { fbWidget.paste(); }
handler: () => { fbWidget.cut(); }
handler: () => { fbWidget.duplicate(); }
handler: () => { fbWidget.delete(); }
handler: () => { fbWidget.rename(); }
handler: () => { fbWidget.open(); }