gomega_dsl.go
func ExpectWithOffset(offset int, actual interface{}, extra ...interface{}) Assertion {
	if globalFailWrapper == nil {
		panic(nilFailHandlerPanic)
	}
	return assertion.New(actual, globalFailWrapper, offset, extra...)
}
func ExpectWithOffset(offset int, actual interface{}, extra ...interface{}) Assertion {
	if globalFailWrapper == nil {
		panic(nilFailHandlerPanic)
	}
	return assertion.New(actual, globalFailWrapper, offset, extra...)
}
// ExpectWithOffset wraps an actual value allowing assertions to be made on it:
//    ExpectWithOffset(1, "foo").To(Equal("foo"))
//
// Unlike `Expect` and `Ω`, `ExpectWithOffset` takes an additional integer argument
// this is used to modify the call-stack offset when computing line numbers.
//
// This is most useful in helper functions that make assertions.  If you want Gomega's
// error message to refer to the calling line in the test (as opposed to the line in the helper function)
// set the first argument of `ExpectWithOffset` appropriately.