Ignore B028 if skip_file_prefixes is used

README.rst

@@ -235,6 +235,7 @@ limitations make it difficult.
 **B028**: No explicit stacklevel argument found. The warn method from the warnings module uses a
 stacklevel of 1 by default. This will only show a stack trace for the line on which the warn method is called.
 It is therefore recommended to use a stacklevel of 2 or greater to provide more information to the user.
+The check is skipped when skip_file_prefixes is used.
 
 .. _B029:
 

bugbear.py

@@ -1708,6 +1708,7 @@ def check_for_b028(self, node) -> None:
             and isinstance(node.func.value, ast.Name)
             and node.func.value.id == "warnings"
             and not any(kw.arg == "stacklevel" for kw in node.keywords)
+            and not any(kw.arg == "skip_file_prefixes" for kw in node.keywords)
             and len(node.args) < 3
             and not any(isinstance(a, ast.Starred) for a in node.args)
             and not any(kw.arg is None for kw in node.keywords)

tests/b028.py

@@ -16,3 +16,4 @@
 kwargs = {"message": "test", "category": DeprecationWarning, "stacklevel": 1}
 warnings.warn(**kwargs)
 warnings.warn(*args, **kwargs)
+warnings.warn("test", DeprecationWarning, skip_file_prefixes=["foo"])