How to use the @ckeditor/ckeditor5-utils/src/diff function in @ckeditor/ckeditor5-utils

return actions;
		}

		let newActions = [];
		let actualSlice = [];
		let expectedSlice = [];

		const counter = { equal: 0, insert: 0, delete: 0 };

		for ( const action of actions ) {
			if ( action === 'insert' ) {
				expectedSlice.push( expectedDom[ counter.equal + counter.insert ] );
			} else if ( action === 'delete' ) {
				actualSlice.push( actualDom[ counter.equal + counter.delete ] );
			} else { // equal
				newActions = newActions.concat( diff( actualSlice, expectedSlice, areSimilar ).map( x => x === 'equal' ? 'replace' : x ) );
				newActions.push( 'equal' );
				// Reset stored elements on 'equal'.
				actualSlice = [];
				expectedSlice = [];
			}
			counter[ action ]++;
		}

		return newActions.concat( diff( actualSlice, expectedSlice, areSimilar ).map( x => x === 'equal' ? 'replace' : x ) );
	}

return actions;
		}

		let newActions = [];
		let actualSlice = [];
		let expectedSlice = [];

		const counter = { equal: 0, insert: 0, delete: 0 };

		for ( const action of actions ) {
			if ( action === 'insert' ) {
				expectedSlice.push( expectedDom[ counter.equal + counter.insert ] );
			} else if ( action === 'delete' ) {
				actualSlice.push( actualDom[ counter.equal + counter.delete ] );
			} else { // equal
				newActions = newActions.concat( diff( actualSlice, expectedSlice, areSimilar ).map( x => x === 'equal' ? 'replace' : x ) );
				newActions.push( 'equal' );
				// Reset stored elements on 'equal'.
				actualSlice = [];
				expectedSlice = [];
			}
			counter[ action ]++;
		}

		return newActions.concat( diff( actualSlice, expectedSlice, areSimilar ).map( x => x === 'equal' ? 'replace' : x ) );
	}

_diffNodeLists( actualDomChildren, expectedDomChildren ) {
		actualDomChildren = filterOutFakeSelectionContainer( actualDomChildren, this._fakeSelectionContainer );

		return diff( actualDomChildren, expectedDomChildren, sameNodes.bind( null, this.domConverter ) );
	}

_diffNodeLists( actualDomChildren, expectedDomChildren ) {
		actualDomChildren = filterOutFakeSelectionContainer( actualDomChildren, this._fakeSelectionContainer );

		return diff( actualDomChildren, expectedDomChildren, sameNodes.bind( null, this.domConverter.blockFiller ) );
	}