Hi, Last week I did some work and updated twistedchecker so that it uses pylint >= 2.4.4. Before that, it was using a really old version of pylint. twistedchecker is run over the Twisted code as part of CI, and reports various style issues. Now that twistedchecker is using a newer pylint, it should be compatible with newer Python language features. Now that Twisted supports Python 3.5+ (with Python 2.7 support being dropped), is it OK to start using newer features of the Python language in the Twisted codebase such as type hints ( https://docs.python.org/3/library/typing.html )? I don't have experience with that feature, but it looks like it could be useful, when combined with a tool like mypy. Does anyone else have opinions on type hints and mypy? -- Craig