hunk.code_window: You can access the channel your release is published under with the `releaseChannel` field in the [manifest object] (https://docs.expo.io/versions/latest/sdk/constants.html#expoconstantsmanifest).
   ## Example Workflow
   Consider a situation where you have a Staging stack for testing on Expo Client, and a Production stack for pushing through TestFlight, then promoting to the AppStore.
  
hunk.labels: keep keep add keep keep keep keep
hunk.after_edit: > `Expo.Constants.manifest.releaseChannel` does NOT exist in dev mode. It does exist, however when you explicitly publish / build with it.
  
hunk.file_path: docs/versions/v24.0.0/guides/release-channels.md
hunk.type: add
file: /*=============================================================================
      Copyright (c) 2001-2014 Joel de Guzman
  
      Distributed under the Boost Software License, Version 1.0. (See accompanying
      file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
  =============================================================================*/
  #if !defined(SPIRIT_NOT_PREDICATE_MARCH_23_2007_0618PM)
  #define SPIRIT_NOT_PREDICATE_MARCH_23_2007_0618PM
  
  #include <boost/spirit/home/x3/core/parser.hpp>
  
  namespace boost { namespace spirit { namespace x3
  {
      template <typename Subject>
      struct not_predicate : unary_parser<Subject, not_predicate<Subject>>
      {
          typedef unary_parser<Subject, not_predicate<Subject>> base_type;
  
          typedef unused_type attribute_type;
          static bool const has_attribute = false;
  
          not_predicate(Subject const& subject)
            : base_type(subject) {}
  
          template <typename Iterator, typename Context
            , typename RContext, typename Attribute>
          bool parse(Iterator& first, Iterator const& last
            , Context const& context, RContext& rcontext, Attribute& /*attr*/) const
          {
              Iterator i = first;
              return !this->subject.parse(i, last, context, rcontext, unused);
          }
      };
  
      template <typename Subject>
      inline not_predicate<typename extension::as_parser<Subject>::value_type>
      operator!(Subject const& subject)
      {
          return { as_parser(subject) };
      }
  }}}
  
  #endif
  