matchers/selection_matchers.go
func HaveCSS(property string, value string) types.GomegaMatcher {
	return &internal.HaveCSSMatcher{ExpectedProperty: property, ExpectedValue: value}
}
func HaveCSS(property string, value string) types.GomegaMatcher {
	return &internal.HaveCSSMatcher{ExpectedProperty: property, ExpectedValue: value}
}
// HaveCSS passes when the expected CSS property and value are present on the element.
// This matcher only matches exact, calculated CSS values, though there is support for parsing colors.
// Example: "blue" and "#00f" will both match rgba(0, 0, 255, 1)
// This matcher will fail if the provided selection refers to more than one element.