text: module.exports = {
    _store: Object.create( null ),
    setItem: function( key, value ) {
      this._store[ key ] = value;
    },
    getItem: function( key ) {
      return key in this._store ? this._store[ key ] : null;
    },
    removeItem: function( key ) {
      if ( key in this._store ) {
        delete this._store[ key ];
      }
    },
    key: function( i ) {
      return Object.keys( this._store )[ i ];
    },
    get length() {
      return Object.keys( this._store ).length;
    }
  };
  