code: function(schema, global) {
    var {
      items
    , minItems
    // , maxItems // does not matter
    } = schema;
  
    if ( items instanceof Array ) {
      return items.map(function(item) {
        return empty(item, global);
      });
    } else if ( minItems && items ) {
      // we need at least this amount of items
      return Array.from(new Array(minItems), () => empty(items, global));
    } else {
      // minItems is not given or we don't know item
      // type, so jsut make empty array
      return [];
    }
  }
docs: array <<