kubernetes/vendor/github.com/onsi/gomega/internal/vetoptdesc.go

// vetOptionalDescription vets the optional description args: if it finds any
// Gomega matcher at the beginning it panics. This allows for rendering Gomega
// matchers as part of an optional Description, as long as they're not in the
// first slot.
func vetOptionalDescription(assertion string, optionalDescription ...interface{ … }