lib/index.esm.js
function get(key) {
    var entry = _collectionStrong.getEntry(_validateCollection(this, MAP), key);
    return entry && entry.v;
  }
function get(key) {
    var entry = _collectionStrong.getEntry(_validateCollection(this, MAP), key);
    return entry && entry.v;
  }
function get ( key ) { var entry = _collectionStrong . getEntry ( _validateCollection ( this , MAP ) , key ) ; return entry && entry . v ; }
23.1.3.6 Map.prototype.get(key)
23 . 1 . 3 . 6 Map . prototype . get ( key )