Fix error in CancelableOperation.then (#127)

Replace a dynamic null check with a dynamic type cast, since the target type may be nullable.
1 file changed
tree: 9e4be15898c0b7472463afeb591244a565e9cd0d
  1. lib/
  2. test/
  3. .gitignore
  4. .test_config
  5. .travis.yml
  6. AUTHORS
  7. CHANGELOG.md
  8. CONTRIBUTING.md
  9. LICENSE
  10. README.md
  11. analysis_options.yaml
  12. pubspec.yaml
README.md

Contains utility classes in the style of dart:async to work with asynchronous computations.