What does removed call to "com.some.Filename::someMethodName" --> SURVIVED mean in pitest. Does it mean that if that method call is removed, the code will still work properly?
When pitest says the mutantion has survived it means it changed the codebase, and not a single test detected the code has changed. So you are not being very demanding on your test suite.
Ideally each mutation created should be killed by at least 1 unit test.
some more information regarding mutation test that may help you: https://pedrorijo.com/blog/intro-mutation/. (disclaimer, I'm the tutorial author)