+import {
+ EditorView, keymap, drawSelection, highlightActiveLine, dropCursor,
+ rectangularSelection, lineNumbers, highlightActiveLineGutter,
+} from '@codemirror/view';
+import {bracketMatching} from '@codemirror/language';
+import {
+ defaultKeymap, history, historyKeymap, indentWithTab,
+} from '@codemirror/commands';
+import {Compartment, EditorState} from '@codemirror/state';
+import {getTheme} from './themes';