meter: export labels len method
Signed-off-by: Vasiliy Tolstov <v.tolstov@unistack.org>
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@ -110,6 +110,10 @@ func (ls Labels) Append(nls Labels) Labels {
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return ls
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}
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func (ls Labels) Len() int {
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return len(ls.keys)
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}
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// LabelIter holds the
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type LabelIter struct {
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labels Labels
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