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// Copyright 2012, 2013 Canonical Ltd.
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// Licensed under the AGPLv3, see LICENCE file for details.
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// NotifyWatcher will send events when something changes.
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// It does not send content for those changes.
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type NotifyWatcher interface {
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Changes() <-chan struct{}
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// StringsWatcher will send events when something changes.
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// The content for the changes is a list of strings.
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type StringsWatcher interface {
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Changes() <-chan []string