Generate tests for fine-grained targets instead of whole modules

[kitsiosk]

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Is your feature request related to a problem? Please describe. In many cases, one may need to generate tests for a specific class, function/method, or even a block of lines within a funciton, for example if someone suspects a faulty behavior in that function.

Describe the solution you'd like Instead of passing the target module as parameter, a target function could be given.

Describe alternatives you've considered

Additional context I do not know if this is possible, given the random mutations that take place, but if you think it is, I would be happy to give it a shot.