Gets a callee of this call site where
imprecision is a heuristic measure of how
likely it is that
callee is only suggested as a potential callee due to
imprecise analysis of global variables and is not, in fact, a viable callee at all.
Callees with imprecision zero, in particular, have either been derived without considering global variables, or are calls to a global variable within the same file, or a global variable that has unique definition within the project.
This predicate can be overridden to alter the call graph used by the interprocedural data flow libraries.