You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: tolerations.go
    path of file: ./repos/kubernetes/pkg/util/tolerations
    
    the code of the file until where you have to start completion: /*
Copyright 2017 The Kubernetes Authors.

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

    http://www.apache.org/licenses/LICENSE-2.0

Unless required 
    
func isSuperset(ss, t api.Toleration) bool {
	if apiequality.Semantic.DeepEqual(&t, &ss) {
		return true
	}

	if t.Key != ss.Key &&
		// An empty key with Exists operator means match all keys & values.
		(ss.Key != "" || ss.Operator != api.TolerationOpExists) {
		return false
	}

	// An empty effect means match all effects.
	if t.Effect != ss.Effect && ss.Effect != "" {
		return false
	}

	if ss.Effect == api.TaintEffectNoExecute {
		if ss.TolerationSeconds != nil {
			if t.TolerationSeconds == nil ||
				*t.TolerationSeconds > *ss.TolerationSeconds {
				return false
			}
		}
	}

	switch ss.Operator {
	case api.TolerationOpEqual, "": // empty operator means Equal
		return t.Operator == api.TolerationOpEqual && t.Value == ss.Value
	case api.TolerationOpExists:
		return true
	default:
		klog.Errorf("Unknown toleration operator: %s", ss.Operator)
		return false
	}
}