void (@NotNull AnActionEvent e) { final DataContext dataContext = e.getDataContext(); final Project project = CommonDataKeys.PROJECT.getData(dataContext); if (project != null) { final VirtualFile[] virtualFiles = CommonDataKeys.VIRTUAL_FILE_ARRAY.getData(dataContext); final Presentation presentation = e.getPresentation(); if (virtualFiles != null) { if (virtualFiles.length == 1) { presentation.setEnabled(!mySeparator.equals(LoadTextUtil.detectLineSeparator(virtualFiles[0], false))); } else { presentation.setEnabled(true); } } else { presentation.setEnabled(false); } } }