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package config
// Fetcher provides an interface to get typed information out of a configuration
// "source". These sources could be the OS environment, a .gitconfig, or even
// just a `map`.
type Fetcher interface {
// Get returns the string value associated with a given key and a bool
// determining if the key exists.
//
// If multiple entries match the given key, the first one will be
// returned.
Get(key string) (val string, ok bool)
// GetAll returns the a set of string values associated with a given
// key. If no entries matched the given key, an empty slice will be
// returned instead.
GetAll(key string) (vals []string)
// All returns a copy of all the key/value pairs for the current
// environment.
All() map[string][]string
}
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