How to use the rc-trigger.displayName function in rc-trigger

function _assertThisInitialized(self) { if (self === void 0) { throw new ReferenceError("this hasn't been initialised - super() hasn't been called"); } return self; }

function _inherits(subClass, superClass) { if (typeof superClass !== "function" && superClass !== null) { throw new TypeError("Super expression must either be null or a function"); } subClass.prototype = Object.create(superClass && superClass.prototype, { constructor: { value: subClass, writable: true, configurable: true } }); if (superClass) _setPrototypeOf(subClass, superClass); }

function _setPrototypeOf(o, p) { _setPrototypeOf = Object.setPrototypeOf || function _setPrototypeOf(o, p) { o.__proto__ = p; return o; }; return _setPrototypeOf(o, p); }

function _defineProperty(obj, key, value) { if (key in obj) { Object.defineProperty(obj, key, { value: value, enumerable: true, configurable: true, writable: true }); } else { obj[key] = value; } return obj; }

import Trigger from 'rc-trigger';
import React from 'react';
import PropTypes from 'prop-types';
import classnames from 'classnames';
import DropdownMenu from './DropdownMenu';
import ReactDOM from 'react-dom';
import { isSingleMode, saveRef } from './util';
Trigger.displayName = 'Trigger';
var BUILT_IN_PLACEMENTS = {
  bottomLeft: {
    points: ['tl', 'bl'],
    offset: [0, 4],
    overflow: {
      adjustX: 0,
      adjustY: 1
    }
  },
  topLeft: {
    points: ['bl', 'tl'],
    offset: [0, -4],
    overflow: {
      adjustX: 0,
      adjustY: 1
    }

import Trigger from 'rc-trigger';
import React from 'react';
import PropTypes from 'prop-types';
import classnames from 'classnames';
import DropdownMenu from './DropdownMenu';
import ReactDOM from 'react-dom';
import { isSingleMode, saveRef } from './util';

Trigger.displayName = 'Trigger';

const BUILT_IN_PLACEMENTS = {
  bottomLeft: {
    points: ['tl', 'bl'],
    offset: [0, 4],
    overflow: {
      adjustX: 0,
      adjustY: 1,
    },
  },
  topLeft: {
    points: ['bl', 'tl'],
    offset: [0, -4],
    overflow: {
      adjustX: 0,
      adjustY: 1,

import _defineProperty from 'babel-runtime/helpers/defineProperty';
import _objectWithoutProperties from 'babel-runtime/helpers/objectWithoutProperties';
import _extends from 'babel-runtime/helpers/extends';
import _classCallCheck from 'babel-runtime/helpers/classCallCheck';
import _createClass from 'babel-runtime/helpers/createClass';
import _possibleConstructorReturn from 'babel-runtime/helpers/possibleConstructorReturn';
import _inherits from 'babel-runtime/helpers/inherits';
import Trigger from 'rc-trigger';
import React from 'react';
import PropTypes from 'prop-types';
import classnames from 'classnames';
import DropdownMenu from './DropdownMenu';
import ReactDOM from 'react-dom';
import { isSingleMode } from './util';

Trigger.displayName = 'Trigger';

var BUILT_IN_PLACEMENTS = {
  bottomLeft: {
    points: ['tl', 'bl'],
    offset: [0, 4],
    overflow: {
      adjustX: 0,
      adjustY: 1
    }
  },
  topLeft: {
    points: ['bl', 'tl'],
    offset: [0, -4],
    overflow: {
      adjustX: 0,
      adjustY: 1