Panic(err) creates an error using format and args and wraps it in a WrappedError which can be handled using Try() and TryCatch().

PanicIfError(err) && PanicIfTrue(expr) can be used to panic in a way that's easily handled by Try() and TryCatch().

If b is false, creates a default error, wraps it and panics.

Utility method, that checks type of error and panics with wrapped error not one of the listed types.

If b is true, creates a default error, wraps it and panics.

If 'f' panics with a WrappedError then recover that error.

If 'f' panics with a WrappedError then recover that error and return it.

If err is a WrappedError, then Cause() is returned, otherwise returns err.

Wraps an error.

d.Chk.<Method>() -- used in test cases and as assertions.