func Contains(x interface{}) Matcher {
	var result containsMatcher
	var ok bool
	if result.elementMatcher, ok = x.(Matcher); !ok {
		result.elementMatcher = Equals(x)
	}
	return &result
}
Return a matcher that matches arrays slices with at least one element that
matches the supplied argument. If the argument x is not itself a Matcher,
this is equivalent to Contains(Equals(x)).
package oglematchers
import (
	"fmt"
	"reflect"
)