[#13468] inconsistent naming convention in dispatcher

[niden]

Hello!

• Type: bug fix - new feature
• Link to issue: Inconsistent naming convention in Dispatcher classes, no way to retrieve a settable value (handler suffix) #13468

In raising this pull request, I confirm the following (please check boxes):

• I have read and understood the Contributing Guidelines?
• I have checked that another pull request for this purpose does not exist.
• I wrote some tests for this PR.

Added missing methods; ability to retrieve properties from the dispatcher

Thanks

[niden]

cc @sergeyklay

[sergeyklay]

I think these lines with method names need to be removed

[niden]

Closing this to make necessary corrections and split the PR into 2.