void () { if (myEditButton != null) { final JdkComboBoxItem selectedItem = getSelectedItem(); if (selectedItem instanceof ProjectJdkComboBoxItem && myProject != null) { myEditButton.setEnabled(ProjectStructureConfigurable.getInstance(myProject).getProjectJdksModel().getProjectSdk() != null); } else { myEditButton.setEnabled(selectedItem != null && selectedItem.getJdk() != null); } } }