structs

type MetadataItem struct {
	Url       string
	ParseFunc MetadataItemParseFunc
}

type MetadataItemParseFunc func(interface{}) (string, error)

type Provider interface {
	Name() string
	IsCurrentProvider() bool
	Read(key string) (string, error)
}

type ProviderMapping struct {
	MetadataAddress string
	MetadataItems   map[string]MetadataItem
}