This adds a mix-in for writable functions arguments.
Change-Id: I758f7fef77d992ea25395db550571ccb081fd5fd
Reviewed-by: Nikolai Kosjar <nikolai.kosjar@qt.io>
We are adding declaration detection for function to the highligher on
user request. Other declaration will follow in separate patches.
Task-number: QTCREATORBUG-15564
Change-Id: I54e97c26425f8d6e9854547d50a9ac8fa076b4e8
Reviewed-by: Nikolai Kosjar <nikolai.kosjar@theqtcompany.com>