src/vs/editor/contrib/multicursor/browser/multicursor.ts/MultiCursorSession/selectAll
class MultiCursorSession:	public selectAll(searchScope: Range[] | null): FindMatch[] {
		if (!this._editor.hasModel()) {
			return [];
		}

		this.findController.highlightFindOptions();

		const editorModel = this._editor.getModel();
		if (searchScope) {
			return editorModel.findMatches(this.searchText, searchScope, false, this.matchCase, this.wholeWord ? this._editor.getOption(EditorOption.wordSeparators) : null, false, Constants.MAX_SAFE_SMALL_INTEGER);
		}
		return editorModel.findMatches(this.searchText, true, false, this.matchCase, this.wholeWord ? this._editor.getOption(EditorOption.wordSeparators) : null, false, Constants.MAX_SAFE_SMALL_INTEGER);
	}