private StackFrameList mask(StackFrameList stackTrace) {
if (maskingRules.isEmpty()) {
return stackTrace;
} else {
StackFrame[] frames = stackTrace.toArray();
for (int i = 0; i != frames.length; ++i) {
frames[i] = mask(frames[i]);
}
return new StackFrameArray(frames);
}
}
