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: vulnerability_metadata.go
    path of file: ./repos/grype/grype/db/v3
    
    the code of the file until where you have to start completion: package v3

import "reflect"

// VulnerabilityMetadata represents all vulnerability data that is not necessary to perform package-to-vulnerability matching.
type VulnerabilityMetadata struct {
	ID           string   // The identifier of the vulnerability or advisory
	Namespace    string   // Where this entry is valid within
	DataSource   string   // A URL where the data was sourced from
	RecordSource string   // The source of the vulnerability information (relative to the immediate upstream in the enterprise feedgroup)
	Severity     string
    
func (v *VulnerabilityMetadata) Equal(vv VulnerabilityMetadata) bool {
	equal := v.ID == vv.ID &&
		v.Namespace == vv.Namespace &&
		v.DataSource == vv.DataSource &&
		v.RecordSource == vv.RecordSource &&
		v.Severity == vv.Severity &&
		v.Description == vv.Description &&
		len(v.URLs) == len(vv.URLs) &&
		len(v.Cvss) == len(vv.Cvss)

	if !equal {
		return false
	}
	for idx, cpe := range v.URLs {
		if cpe != vv.URLs[idx] {
			return false
		}
	}
	for idx, item := range v.Cvss {
		if !reflect.DeepEqual(item, vv.Cvss[idx]) {
			return false
		}
	}

	return true
}