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/*! * ignore */
'use strict';
const assert = require('assert');const mquery = require('mquery');
/** * Helper for multiplexing promise implementations * * @api private */
const store = {  _promise: null};
/** * Get the current promise constructor * * @api private */
store.get = function() {  return store._promise;};
/** * Set the current promise constructor * * @api private */
store.set = function(lib) {  assert.ok(typeof lib === 'function',    `mongoose.Promise must be a function, got ${lib}`);  store._promise = lib;  mquery.Promise = lib;};
/*! * Use native promises by default */
store.set(global.Promise);
module.exports = store;