How to use the prosemirror-view.DecorationSet.empty function in prosemirror-view

const shouldMark = startLetter === '@' && nextCh.charCodeAt(0) === 32;
				if (shouldMark) {
					const substring = currentLine.substring(startIndex + 1, nextChIndex) || ' ';
					const start = currentPos.pos - currentPos.parentOffset + startIndex;
					const end = currentPos.pos - currentPos.parentOffset + startIndex + 1 + substring.length;
					const decorations = [Decoration.inline(start, end, { class: 'mention-marker' })];
					const decos = DecorationSet.create(editorState.doc, decorations);

					// updateMentions(currentLine.substring(start - 1, currentPos.pos) || ' ');
					updateMentions(substring);
					return { decos: decos, start, end };
				}

			}
			updateMentions('');
			return { decos: DecorationSet.empty, start: null, end: null };
		}
	},

    init() { return {deco: DecorationSet.empty, commit: null} },
    apply(tr, prev, oldState, state) {

init() {
			return { deco: DecorationSet.empty };
		},
		apply(transaction, state, prevEditorState, editorState) {

init() {
            return DecorationSet.empty
          },
          apply: (tr, old) => {

init(config, instance) {
			const {DecorationSet, Decoration} = require("prosemirror-view");
      return {deco: DecorationSet.empty,
        linkedEditor: config.linkedEditor,
        originalEditor: config.originalEditor,
        showAsAdditions: config.showAsAdditions,
      };
    },
    apply(action, state, prevEditorState, editorState) {

init() {
      return DecorationSet.empty;
    },

    init() { return DecorationSet.empty },
    apply(tr, set) {

_createDecorations = (editorState) => {
    const {DecorationSet} = require("prosemirror-view");
    return DecorationSet.empty;
  }

public isDragging = () =>
    this.view.dragging ?? (this.decorationSet !== DecorationSet.empty || !isUndefined(this.target));

init: (_, state) => {
        const { from, to } = new AllSelection(state.doc);
        return addDecosBetween(from, to, state.doc, DecorationSet.empty);
      },
      apply: (tr, prevDecos, _, state) =>