Object (@NotNull String dataId) { if (FileSystemTree.DATA_KEY.is(dataId)) { return myFileSystemTree; } if (CommonDataKeys.VIRTUAL_FILE_ARRAY.is(dataId)) { return myFileSystemTree == null ? null : myFileSystemTree.getSelectedFiles(); } if (PlatformDataKeys.PASTE_PROVIDER.is(dataId)) { return myPasteProvider; } return myChooserDescriptor.getUserData(dataId); }