array(10) {
  ["id"]=>
  string(11) "event_group"
  ["title"]=>
  string(5) "Files"
  ["type"]=>
  string(0) ""
  ["pages"]=>
  array(1) {
    [0]=>
    string(6) "events"
  }
  ["context"]=>
  string(6) "normal"
  ["priority"]=>
  string(4) "high"
  ["show_names"]=>
  bool(true)
  ["show_on"]=>
  array(2) {
    ["key"]=>
    bool(false)
    ["value"]=>
    bool(false)
  }
  ["cmb_styles"]=>
  bool(true)
  ["fields"]=>
  array(1) {
    [0]=>
    array(4) {
      ["id"]=>
      string(22) "_cmb_event_first_group"
      ["type"]=>
      string(5) "group"
      ["options"]=>
      array(3) {
        ["add_button"]=>
        string(8) "Add file"
        ["remove_button"]=>
        string(11) "Remove file"
        ["sortable"]=>
        bool(true)
      }
      ["fields"]=>
      array(2) {
        [0]=>
        array(3) {
          ["name"]=>
          string(4) "Name"
          ["id"]=>
          string(13) "eventfilename"
          ["type"]=>
          string(4) "text"
        }
        [1]=>
        array(3) {
          ["name"]=>
          string(16) "File to download"
          ["id"]=>
          string(9) "eventfile"
          ["type"]=>
          string(4) "file"
        }
      }
    }
  }
}