func (hyperNode *HyperNode) contains(a []*HyperNode) (bool, *HyperNode) {
    var count int
    for _, value := range a {
        count = 0
        if len(value.elements) != len(hyperNode.elements) {
            continue
        }
        for j := 0; j < len(value.elements); j++ {
            if value.elements[j].name == hyperNode.elements[j].name {
                count++
            }
        }
        if count == len(value.elements) {
            return true, value
        }
    }
    return false, hyperNode
}