core-js/internals/iterator-cleanup-state.js

Standard library

'use strict';
// release references held by exhausted / closed iterator helpers to allow GC of the source chain
module.exports = function (state) {
  state.iterator = state.next = state.nextHandler = state.mapper = state.predicate = state.inner =
    state.iterables = state.iters = state.openIters = state.padding = state.finishResults = state.buffer = null;
};