How to use the rst-selector-parser.createParser function in rst-selector-parser

import flat from 'array.prototype.flat';
import is from 'object-is';
import has from 'has';
import elementsByConstructor from 'html-element-map/byConstructor';
import {
  treeFilter,
  nodeHasId,
  findParentNode,
  nodeMatchesObjectProps,
  childrenOfNode,
  hasClassName,
} from './RSTTraversal';
import { nodeHasType, propsOfNode } from './Utils';
import getAdapter from './getAdapter';
// our CSS selector parser instance
const parser = createParser();

// Combinators that allow you to chance selectors
const CHILD = 'childCombinator';
const ADJACENT_SIBLING = 'adjacentSiblingCombinator';
const GENERAL_SIBLING = 'generalSiblingCombinator';
const DESCENDANT = 'descendantCombinator';

// Selectors for targeting elements
const SELECTOR = 'selector';
const TYPE_SELECTOR = 'typeSelector';
const CLASS_SELECTOR = 'classSelector';
const ID_SELECTOR = 'idSelector';
const UNIVERSAL_SELECTOR = 'universalSelector';
const ATTRIBUTE_PRESENCE = 'attributePresenceSelector';
const ATTRIBUTE_VALUE = 'attributeValueSelector';
// @TODO we dont support these, throw if they are used