The impact analysis plugin has a method slice which slices the given statement according to the impact analysis. Is it like the slicing plugin where we create project then we choose the slicing zone and after adding this zone to the request? How could i print the result of this impact analysis slice?
The function Db.Impact.slice has actually no real link to the Impact plugin. It simply computes a slicing request on the given list of statements, without calling Impact anywhere. As you noticed, you can already build this request from the API of Slicing, while Db.Impact.Stmt is not customizable.
(This function slice should be internal to Impact. It is used in the GUI when the user has selected the option Slicing after impact. We will remove it in the next release to lift this ambiguity.)